Carrier Heat Pump 50BV020 064 User Manual
OMNIZONE™  
50BV020-064  
Water-Cooled and Remote Air-Cooled  
Indoor Self-Contained Systems and  
Water-Cooled Heat Pumps  
Installation, Start-Up and  
Service Instructions  
Page  
CONTENTS  
•
•
•
•
•
•
•
•
LOG ON TO THE LID DISPLAY  
CHANGE THE DEFAULT PASSWORD  
SET THE CLOCK  
Page  
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . .1,2  
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
MAJOR SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . 2  
Constant Volume (CV) Units. . . . . . . . . . . . . . . . . . . . . . 2  
Variable Air Volume (VAV) Units . . . . . . . . . . . . . . . . . . 2  
CONFIGURE SCHEDULES  
PROGRAM SET POINTS  
CHECK SYSTEM PARAMETERS  
DISPLAY ALARM HISTORY  
CONFIGURE THE CUSTOM PROGRAMMING  
SELECTIONS  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30  
Step 1 — Complete Pre-Installation Checks . . . . . . 3  
•
•
SET CONTROLLER ADDRESS  
LOG OFF FROM THE CONTROLLER  
•
•
•
EXAMINE THE UNIT  
UNIT STORAGE  
Sequence of Operation (CV Only) . . . . . . . . . . . . . . . 47  
•
WATER ECONOMIZER COOLING  
MODULAR UNITS  
Sequence of Operation (VAV Only) . . . . . . . . . . . . . . 48  
Step 2 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 3  
•
•
•
•
SUPPLY FAN  
•
•
•
•
•
REMOVE PACKAGING  
COMPRESSOR COOLING  
WATER ECONOMIZER COOLING  
COOLING RESET  
UNIT LOCATION  
UNIT PLACEMENT  
ACOUSTICAL CONSIDERATIONS  
ASSEMBLING MODULAR UNITS  
Diagnostic Features (CV Only) . . . . . . . . . . . . . . . . . . 48  
VAV Control and VFD Diagnostics. . . . . . . . . . . . . . . 48  
Step 3 — Install Ductwork. . . . . . . . . . . . . . . . . . . . . . . 19  
•
DUCT STATIC PRESSURE PROBE AND TUBING  
(VAV Only)  
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Fan Motor Replacement. . . . . . . . . . . . . . . . . . . . . . . . . 49  
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-51  
Cleaning Unit Exterior. . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Coil Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Condensate Drains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49  
Water-Cooled Condensers . . . . . . . . . . . . . . . . . . . . . . 49  
•
DUCT HIGH-STATIC (DHS) LIMIT SWITCH (VAV Only)  
Step 4 — Make Piping Connections . . . . . . . . . . . . . 21  
•
•
•
•
•
CONDENSER WATER PIPING (Water-Cooled Only)  
EVAPORATOR CONDENSATE DRAIN  
HOT WATER HEATING COIL (Optional)  
WATER ECONOMIZER (Optional)  
REMOTE REFRIGERANT PIPING  
(Remote Air-Cooled Only)  
Step 5 — Complete Electrical Connections. . . . . . 24  
•
•
GRAVITY FLOW METHOD  
•
•
•
•
•
•
•
•
•
POWER WIRING  
FORCED CIRCULATION METHOD  
CONTROL WIRING (CV Only)  
REMOTE CONDENSER FAN CONTACTOR WIRING  
CONTROL WIRING (VAV Only)  
Fan Motor Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . 50  
Fan Bearing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . 50  
Fan Sheaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50  
SUPPLY AIR TEMPERATURE SENSOR (SAT)  
SMOKE DETECTOR/FIRE ALARM SHUTDOWN (FSD)  
ALARM (ALARM) AND WARNING (WARN) OUTPUTS  
REMOTE OCCUPANCY (ROCC)  
•
ALIGNMENT  
Evaporator Fan Performance Adjustment . . . . . . . 51  
BELT TENSION ADJUSTMENT  
Charging the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . 51  
•
RETURN AIR TEMPERATURE SENSOR (RAS)  
•
REMOTE AIR-COOLED UNITS  
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-48  
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30  
Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51  
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 51-65  
•
•
•
•
•
•
CRANKCASE HEATERS  
CONFIRM THE INPUT POWER PHASE SEQUENCE  
INTERNAL WIRING  
Forcing and Clearing an Input or Output  
(VAV only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54  
RETURN-AIR FILTERS  
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . .CL-1, CL-2  
COMPRESSOR MOUNTING  
REFRIGERANT SERVICE PORTS  
CV Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31  
SAFETY CONSIDERATIONS  
•
•
•
EVAPORATOR FAN  
COOLING  
Installing, starting up, and servicing air-conditioning  
components and equipment can be dangerous. Only trained,  
qualified installers and service mechanics should install, start-  
up, and service this equipment.  
When working on the equipment, observe precautions in  
the literature and on tags, stickers, and labels attached to the  
HEATING (Heat Pump Units Only)  
VAV Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42  
•
•
•
PERFORM AUTOMATIC RUN TEST  
CHECK VFD  
POWER UP LID DISPLAY  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53500001-01 Printed in U.S.A. Form 50BV-3SI Pg 1 10-08 Replaces: 50BV-2SI  
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For single piece units, use spreader bars and rigging straps if  
lifting with a crane to avoid damage to the unit. Otherwise,  
move with a fork truck using the shipping pallet.  
INSTALLATION  
Omnizone™ 50BV units are intended for indoor installa-  
tion only. Determine building alterations required to run piping,  
wiring, and ductwork. Read all installation instructions before  
installing the unit.  
Refer to Fig. 2-14 for unit dimensions.  
Refer to Tables 3A and 3B for physical data.  
REMOVE PACKAGING — Remove all protective plastic,  
remove and discard unit top cover protector, filter cover,  
controller display protector, and water piping connection  
packaging.  
UNIT LOCATION — Locate the unit in an indoor area  
that allows easy removal of the filters, access panels, and  
accessories. Make certain enough space is available for service  
personnel to perform maintenance or repairs. Provide sufficient  
room to make all water, duct, and electrical connections. If the  
unit is located in a small mechanical equipment room, make  
sure adequate space is available for air to return freely to the  
unit. These units are not approved for outdoor installations and  
must be installed inside the structure. Do not locate in areas  
that are subject to freezing.  
Step 1 — Complete Pre-Installation Checks  
EXAMINE THE UNIT — Examine the unit for shipping  
damage. File a claim with the transit company if damage is  
found. Check the shipment for completeness. Verify that the  
nameplate electrical requirements match the available power  
supply.  
UNIT STORAGE — The 50BV units are designed and pack-  
aged for indoor storage and use only. If the equipment is not  
needed for immediate installation upon its arrival at the job site,  
it should be left in its shipping carton and stored in a clean, dry  
area. Units must only be stored or moved in the normal upright  
position, as indicated by the “UP” arrows on each carton, at all  
times. DO NOT STACK UNITS.  
MODULAR UNITS — The 50BVT,U,V,W,X units are shipped  
in multiple sections for easy movement and installation. The  
separate modules will pass through a standard 36-in. steel-  
framed door or service elevator. Circuit integrity is maintained  
because none of the refrigerant piping requires disconnection.  
Water piping connections are made with the use of heavy-duty  
bronze-bodied unions so no field welding or brazing is required.  
See Table 2 for the number of sections per unit.  
UNIT PLACEMENT — Ensure that the floor is structurally  
strong enough to support the weight of the equipment with  
minimum deflection. A good, level floor is required for proper  
unit operation and to ensure proper fit-up and alignment of all  
bolt together and union coupled modules on modular units.  
a50-7257ef  
Table 2 — Modular Unit Shipping Table  
USE  
SPREADER  
BAR TO  
PREVENT  
DAMAGE  
TO UNIT  
NUMBER OF SECTIONS  
SECTIONS  
50BVT, U, V, W, X  
034  
044  
054  
064  
Main Air Conditioning  
Weight (lb) (each)  
1
2
2
2
2100  
1825  
2200  
2225  
Reheat Coil Option  
Weight (lb) (each)  
1
40  
2
40  
2
40  
2
40  
Economizer/Filter  
Filter Section Weight (lb)  
Economizer Weight (lb)  
1
310  
200  
2
310  
200  
2
310  
200  
2
310  
200  
4 X 4 ABOVE  
AND BELOW  
RETURN DUCT  
CONNECTIONS  
Fan Section  
Weight (lb) (each)  
1
650  
2
650  
2
650  
2
650  
Total Unit  
Weight (lb)  
4
8
8
8
3300  
5400  
6150  
6150  
NOTE: Units ship with the main air conditioning, economizer/  
filter, and, when selected, the reheat coil sections assembled  
together. These can be easily disassembled, as required, in the  
field. The fan section(s) always ships separately.  
Step 2 — Rig and Place Unit — Use proper lifting  
and handling practices to avoid damage to the unit. Move  
modular units with a fork truck using the baserails provided, or  
use spreader bars and lifting straps as shown in Fig. 1.  
Fig. 1 — Modular Unit Rigging  
3
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NOTES:  
1. Dimensions in inches [mm].  
2. VAV models (50BVJ) are rear return, top supply only.  
3. Compressor, controls, and condenser access are through front panels.  
4. Field power connections are 1-3/4 inches. Control connections are 7/8 inches.  
5. Optional blower orientation is selected in model number nomenclature as option 9 in FIOP section  
(digits 15 and 16).  
Shows recommended minimum service clearances.  
OPTIONAL  
BLOWER  
ORIENTATION  
STANDARD  
BLOWER  
ORIENTATION  
OPTIONAL  
BLOWER  
ORIENTATION  
STANDARD  
BLOWER  
ORIENTATION  
Fig. 2 — 50BVC,J,Q020-034 Dimensions  
a50-8199  
4
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NOTES:  
1. Dimensions in inches [mm].  
2. VAV models (50BVK) are rear return, top supply only.  
3. Compressor, controls, and condenser access are through front panels.  
4. Field power connections are 1-3/4 inches. Control connections are 7/8 inches.  
5. Discharge (hot gas) connections are 1-1/8 in. OD.  
6. Liquid line connections are 7/8 in. OD.  
7. Optional blower orientation is selected in model number nomenclature as  
option 9 in FIOP section (digits 15 and 16).  
RECOMMENDED CONDENSER MATCHES:  
50BV020  
50BV024  
50BV028  
50BV034  
one (1) 09DK020 (50/50 split each)  
one (1) 09DK024 (50/50 split each)  
one (1) 09DK028 (50/50 split each)  
one (1) 09DK034 (50/50 split each)  
Shows recommended minimum service clearances.  
OPTIONAL  
BLOWER  
ORIENTATION  
STANDARD  
BLOWER  
ORIENTATION  
OPTIONAL  
BLOWER  
ORIENTATION  
STANDARD  
BLOWER  
ORIENTATION  
Fig. 3 — 50BVE,K020-034 Dimensions  
a50-8200  
5
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69.50  
SHIPPING SECTION  
2.00  
65.50  
2.00  
2.88  
BLOWER  
SECTION  
ACCESS  
BLOWER  
SECTION  
ACCESS  
31.00  
54.38  
STANDARD  
DISCHARGE  
EVAPORATOR  
ACCESS  
54.75  
81.50  
80.00  
3.75  
15.00  
13.00  
COMPRESSOR  
ACCESS  
10.75  
8.75  
5.00  
LIFTING SUPPORT RAIL  
23.25  
REAR VIEW  
RETURN AIR VIEW  
51.63  
9.88  
LEFT SIDE VIEW  
49.75  
21.75  
5.50  
BLOWER  
SECTION  
ACCESS  
23.75  
18.75  
REAR DISCHARGE  
(Optional)  
3.19  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
FILTER ACCESS  
111.00  
ECONO COIL (Optional)  
DIRECT EXPANSION  
EVAPORATOR  
REHEAT COIL (Optional)  
ELECTRICAL  
1.50  
ELECTRICAL BOX  
WATER IN  
(ECONO COIL  
OPTIONAL)  
COMPRESSOR  
ACCESS  
ELECTRICAL BOX  
ACCESS  
1.50  
D
a50-8201  
A
B
FRONT VIEW  
C
LEFT SIDE VIEW  
NOTES:  
CONNECTIONS  
1. Dimensions in inches.  
A
B
C
D
WATER OUT  
WATER IN  
2-1/2 in. FPT  
2-1/2 in. FPT  
1-1/4 in. FPT  
1-1/4 in. FPT  
2. All units are rear return airflow configuration.  
3. Constant volume units are available with front or rear air supply.  
4. VAV units (50BVW) are available with rear supply only.  
5. Recommended minimum service clearances are as follows:  
a. Front and rear — 30 in. (762 mm)  
CONDENSATE DRAIN  
ECONOMIZER DRAIN  
b. Left or right side — 65 in. (1651 mm) for coil removal  
c. Side opposite coil removal — 20 in. (508 mm)  
REPLACEMENT FILTERS : EIGHT (8) AT 17 x 27 x 4 INCHES.  
Fig. 4 — 50BVT,V,W034 (High-Boy) Dimensions  
6
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CONNECTIONS  
A
B
C
D
WATER OUT  
2-1/2 in. FPT  
2-1/2 in. FPT  
1-1/4 in. FPT  
1-1/4 in. FPT  
WATER IN  
CONDENSATE DRAIN  
ECONOMIZER DRAIN  
REPLACEMENT FILTERS : EIGHT (8) AT 17 x 27 x 4 INCHES.  
NOTES:  
1. Dimensions in inches.  
2. All units are rear return airflow configuration.  
3. Recommended minimum service clearances are as follows:  
a. Front and rear — 30 in. (762 mm)  
b. Left or right side — 65 in. (1651 mm) for coil removal  
c. Side opposite coil removal — 20 in. (508 mm)  
Fig. 5 — 50BVT,V,W034 (Low-Boy) Dimensions  
a50-8202.eps  
7
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69.50  
SHIPPING SECTION  
69.50  
SHIPPING SECTION  
2.00  
4.00  
2.00  
65.50  
65.50  
2.88  
2.00  
BLOWER  
SECTION  
ACCESS  
BLOWER  
SECTION  
ACCESS  
BLOWER  
SECTION  
ACCESS  
31.00  
54.38  
STANDARD  
DISCHARGE  
EVAPORATOR  
ACCESS  
54.75  
81.50  
80.00  
3.75  
15.00  
13.00  
COMPRESSOR  
ACCESS  
COMPRESSOR  
ACCESS  
10.75  
8.75  
5.00  
LIFTING SUPPORT RAIL  
REAR VIEW  
23.25  
RETURN AIR VIEW  
51.63  
9.88  
LEFT SIDE VIEW  
19.75  
9.88  
49.75  
21.75  
49.75  
21.75  
5.50  
BLOWER  
SECTION  
ACCESS  
23.75  
REAR DISCHARGE  
(OPTIONAL)  
18.75  
3.19  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
FILTER ACCESS  
111.00  
ECONO COIL (OPTIONAL)  
DIRECT EXPANSION  
EVAPORATOR  
REHEAT COIL (OPTIONAL)  
ELECTRICAL  
1.50  
ELECTRICAL BOX  
ELECTRICAL BOX  
WATER IN  
(ECONO COIL  
OPTIONAL)  
ELECTRICAL BOX  
ACCESS  
COMPRESSOR  
ACCESS  
ELECTRICAL BOX  
ACCESS  
COMPRESSOR  
ACCESS  
1.50  
D
139.00  
A
B
C
FRONT VIEW  
LEFT SIDE VIEW  
CONNECTIONS  
NOTES:  
1. Dimensions in inches.  
UNIT SIZE  
WATER OUT  
WATER IN  
044  
054  
064  
2. All units are rear return airflow configuration.  
3. CV units are available with front or rear air supply.  
4. VAV units (50BVW) are available with rear supply only.  
5. Recommended minimum service clearances are as follows:  
a. Front and rear — 30 in. (762 mm)  
A
B
C
D
2-1/2 in. FPT  
2-1/2 in. FPT  
3 in. FPT  
3 in. FPT  
3 in. FPT  
3 in. FPT  
CONDENSATE DRAIN 1-1/4 in. FPT 1-1/4 in. FPT 1-1/4 in. FPT  
ECONOMIZER DRAIN 1-1/4 in. FPT 1-1/4 in. FPT 1-1/4 in. FPT  
b. Left and right sides — 65 in. (1651 mm) for coil removal  
REPLACEMENT FILTERS : SIXTEEN (16) AT 17 x 27 x 4 INCHES.  
a50-8203  
Fig. 6 — 50BVT,V,W044-064 (High-Boy) Dimensions  
8
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NOTES:  
1. Dimensions in inches.  
2. All units are rear return airflow configuration.  
3. Recommended minimum service clearances are as follows:  
a. Front and rear — 30 in. (762 mm)  
b. Left and right sides — 65 in. (1651 mm) for coil removal  
CONNECTIONS  
UNIT SIZE  
WATER OUT  
WATER IN  
044  
054  
064  
A
B
C
D
2-1/2 in. FPT  
2-1/2 in. FPT  
3 in. FPT  
3 in. FPT  
3 in. FPT  
3 in. FPT  
CONDENSATE DRAIN 1-1/4 in. FPT 1-1/4 in. FPT 1-1/4 in. FPT  
ECONOMIZER DRAIN 1-1/4 in. FPT 1-1/4 in. FPT 1-1/4 in. FPT  
REPLACEMENT FILTERS : SIXTEEN (16) AT 17 x 27 x 4 INCHES.  
Fig. 7 — 50BVT,V,W044-064 (Low-Boy) Dimensions  
a50-8204  
9
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69.50  
SHIPPING SECTION  
2.00  
65.50  
2.00  
2.88  
BLOWER  
SECTION  
ACCESS  
BLOWER  
SECTION  
ACCESS  
31.00  
54.38  
STANDARD  
DISCHARGE  
EVAPORATOR  
ACCESS  
54.75  
81.50  
80.00  
D
C
B
A
COMPRESSOR  
ACCESS  
13.00  
10.75  
8.75  
5.00  
LIFTING SUPPORT RAIL  
23.25  
REAR VIEW  
RETURN AIR VIEW  
51.63  
9.88  
LEFT SIDE VIEW  
49.75  
21.75  
5.50  
BLOWER  
SECTION  
ACCESS  
23.75  
18.75  
REAR DISCHARGE  
(Optional)  
3.19  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
FILTER ACCESS  
111.00  
ECONO COIL (Optional)  
DIRECT EXPANSION  
EVAPORATOR  
REHEAT COIL (Optional)  
ELECTRICAL  
1.50  
ELECTRICAL BOX  
WATER IN  
(ECONO COIL  
OPTIONAL)  
COMPRESSOR  
ACCESS  
ELECTRICAL BOX  
ACCESS  
1.50  
F
FRONT VIEW  
E
LEFT SIDE VIEW  
NOTES:  
1. Dimensions in inches.  
2. All units are rear return airflow configuration.  
CONNECTIONS  
A
LIQUID LINE CIRCUIT 1  
7/8 in. OD  
7/8 in. OD  
3. Constant volume units are available with front or rear air supply.  
4. VAV units (50BVX) are available with rear supply only.  
5. Recommended condenser match is ONE (1) 09DK034 (50/50 split).  
6. Use proper piping practice for remote refrigerant connections. Refer to  
Carrier System Design Manual Part 3.  
B
C
D
E
F
LIQUID LINE CIRCUIT 2  
DISCHARGE LINE CIRCUIT 1  
DISCHARGE LINE CIRCUIT 2  
CONDENSATE DRAIN  
1-1/8 in. OD  
1-1/8 in. OD  
1-1/4 in. FPT  
1-1/4 in. FPT  
7. Recommended minimum service clearances are as follows:  
a. Front and rear — 30 in. (762 mm)  
ECONOMIZER DRAIN  
b. Left or right side — 65 in. (1651 mm) for coil removal  
c. Side opposite coil removal — 20 in. (508 mm)  
REPLACEMENT FILTERS : EIGHT (8) AT 17 x 27 x 4 INCHES. a50-8205  
Fig. 8 — 50BVU,X034 (High-Boy) Dimensions  
10  
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CONNECTIONS  
A
B
C
D
E
F
LIQUID LINE CIRCUIT 1  
7/8 in. OD  
7/8 in. OD  
LIQUID LINE CIRCUIT 2  
DISCHARGE LINE CIRCUIT 1  
DISCHARGE LINE CIRCUIT 2  
CONDENSATE DRAIN  
1-1/8 in. OD  
1-1/8 in. OD  
1-1/4 in. FPT  
1-1/4 in. FPT  
ECONOMIZER DRAIN  
REPLACEMENT FILTERS : EIGHT (8) AT 17 x 27 x 4 INCHES.  
NOTES:  
1. Dimensions in inches.  
2. All units are rear return airflow configuration.  
3. Recommended condenser match is ONE (1) 09DK034 (50/50 split).  
4. Use proper piping practice for remote refrigerant connections. Refer to  
Carrier System Design Manual Part 3.  
5. Recommended minimum service clearances are as follows:  
a. Front and rear — 30 in. (762 mm)  
b. Left or right side — 65 in. (1651 mm) for coil removal  
c. Side opposite coil removal — 20 in. (508 mm)  
a50-8206  
Fig. 9 — 50BVU,X034 (Low-Boy) Dimensions  
11  
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69.50  
SHIPPING SECTION  
69.50  
SHIPPING SECTION  
2.00  
4.00  
2.00  
65.50  
65.50  
2.88  
2.00  
BLOWER  
SECTION  
ACCESS  
BLOWER  
SECTION  
ACCESS  
BLOWER  
SECTION  
ACCESS  
31.00  
54.38  
STANDARD  
DISCHARGE  
EVAPORATOR  
ACCESS  
54.75  
81.50  
80.00  
D
C
B
D
C
B
A
COMPRESSOR  
ACCESS  
COMPRESSOR  
ACCESS  
A
13.00  
10.75  
8.75  
5.00  
LIFTING SUPPORT RAIL  
REAR VIEW  
23.25  
RETURN AIR VIEW  
51.63  
9.88  
LEFT SIDE VIEW  
19.75  
9.88  
49.75  
21.75  
49.75  
21.75  
5.50  
BLOWER  
SECTION  
ACCESS  
23.75  
REAR DISCHARGE  
(OPTIONAL)  
18.75  
3.19  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
EVAPORATOR  
ACCESS  
FILTER ACCESS  
111.00  
ECONO COIL (OPTIONAL)  
DIRECT EXPANSION  
EVAPORATOR  
REHEAT COIL (OPTIONAL)  
ELECTRICAL  
1.50  
ELECTRICAL BOX  
ELECTRICAL BOX  
WATER IN  
(ECONO COIL  
OPTIONAL)  
ELECTRICAL BOX  
ACCESS  
COMPRESSOR  
ACCESS  
ELECTRICAL BOX  
ACCESS  
COMPRESSOR  
ACCESS  
1.50  
F
139.00  
E
FRONT VIEW  
LEFT SIDE VIEW  
NOTES:  
CONNECTIONS  
UNIT SIZE  
1. Dimensions in inches.  
2. All units are rear return airflow configuration.  
044  
054  
064  
3. CV units are available with front or rear air supply.  
4. VAV units (50BVX) are available with rear supply only.  
A
B
C
D
E
F
LIQUID LINE CIRCUIT 1, 2  
LIQUID LINE CIRCUIT 3, 4  
7/8 in. OD  
7/8 in. OD  
7/8 in. OD  
7/8 in. OD  
7/8 in. OD  
7/8 in. OD  
5. Use proper piping practice for remote refrigerant connections. Refer to  
Carrier System Design Manual Part 3.  
DISCHARGE LINE CIRCUIT 1, 2 1-1/8 in. OD 1-1/8 in. OD 1-1/8 in. OD  
DISCHARGE LINE CIRCUIT 3, 4 1-1/8 in. OD 1-1/8 in. OD 1-1/8 in. OD  
6. Recommended minimum service clearances are as follows:  
a. Front and rear — 30 in. (762 mm)  
b. Left and right sides — 65 in. (1651 mm) for coil removal  
CONDENSATE DRAIN  
ECONOMIZER DRAIN  
1-1/4 in. FPT 1-1/4 in. FPT 1-1/4 in. FPT  
1-1/4 in. FPT 1-1/4 in. FPT 1-1/4 in. FPT  
a50-8207  
REPLACEMENT FILTERS : SIXTEEN (16) AT 17 x 27 x 4 INCHES.  
Fig. 10 — 50BVU,X044-064 (High-Boy) Dimensions  
12  
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NOTES:  
1. Dimensions in inches.  
2. All units are rear return airflow configuration.  
3. Use proper piping practice for remote refrigerant connections. Refer to  
Carrier System Design Manual Part 3.  
4. Recommended minimum service clearances are as follows:  
a. Front and rear — 30 in. (762 mm)  
b. Left and right sides — 65 in. (1651 mm) for coil removal  
CONNECTIONS  
UNIT SIZE  
044  
054  
064  
A
B
C
D
E
F
LIQUID LINE CIRCUIT 1, 2  
LIQUID LINE CIRCUIT 3, 4  
7/8 in. OD  
7/8 in. OD  
7/8 in. OD  
7/8 in. OD  
7/8 in. OD  
7/8 in. OD  
DISCHARGE LINE CIRCUIT 1, 2 1-1/8 in. OD 1-1/8 in. OD 1-1/8 in. OD  
DISCHARGE LINE CIRCUIT 3, 4 1-1/8 in. OD 1-1/8 in. OD 1-1/8 in. OD  
CONDENSATE DRAIN  
ECONOMIZER DRAIN  
1-1/4 in. FPT 1-1/4 in. FPT 1-1/4 in. FPT  
1-1/4 in. FPT 1-1/4 in. FPT 1-1/4 in. FPT  
REPLACEMENT FILTERS : SIXTEEN (16) AT 17 x 27 x 4 INCHES.  
Fig. 11 — 50BVU,X044-064 (Low-Boy) Dimensions  
a50-8208  
13  
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NOTES:  
1. Dimensions in inches [mm].  
2. Refer to base unit certified drawing for additional unit dimensions, service  
clearance, and alternate airflow configurations.  
a50-7306ef  
Fig. 12 — 50BVC,J,Q020-028 with Optional Waterside Economizer Dimensions  
14  
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NOTES:  
1. Dimensions in inches [mm].  
2. Refer to base unit certified drawing for additional unit dimensions, service  
clearances, and alternate airflow configurations.  
a50-7307ef  
Fig. 13 — 50BVC,J,Q034 with Optional Waterside Economizer Dimensions  
15  
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a50-8235  
*
*
Size 034 Units  
Size 044-064 Units  
Shipping Weights (lb)  
HIGH-BOY UNIT  
LOW-BOY UNIT  
50BVT,U,V,W,X UNIT  
034  
044  
054  
064  
034  
044  
054  
064  
MAIN AIR CONDITIONING SECTION (EACH)  
NUMBER OF SECTIONS  
SECTION WEIGHT  
REHEAT COIL OPTION  
FILTER/ECONOMIZER SECTION (EACH)  
NUMBER OF SECTIONS  
FILTER SECTION  
ECONOMIZER OPTION  
FAN SECTION (EACH)  
NUMBER OF SECTIONS  
FAN SECTION  
1
2
2
2
1
2
2
2
1450  
40  
1175  
40  
1550  
40  
1575  
40  
2100  
40  
1825  
40  
2200  
40  
2225  
40  
1
310  
200  
2
310  
200  
2
310  
200  
2
310  
200  
1
310  
200  
2
310  
200  
2
310  
200  
2
310  
200  
1
650  
2
650  
2
650  
2
650  
INCLUDED IN  
AIR CONDITIONING SECTION  
TOTAL UNIT  
NUMBER OF SECTIONS  
UNIT WITH OPTIONS  
3
6
6
6
2
4
4
4
2650  
4750  
5500  
5550  
2650  
4750  
5500  
5550  
*High-boy/low-boy.  
Fig. 14 — Modular Shipping Weights — 50BVT,U,V,W,X  
16  
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Table 3A — Physical Data — 50BVC,E,J,K,Q  
UNIT 50BVC,E,J,K,Q  
NOMINAL CAPACITY (Tons)  
020  
18  
024  
20  
028  
25  
034  
30  
OPERATING WEIGHT (lb)  
50BVC,Q…50BVJ  
50BVE…50BVK  
1192…1227  
1110…1145  
1378…1413  
1290…1325  
1428…1473  
1320…1365  
1680…1725  
1520…1565  
COMPRESSOR  
Copeland Scroll  
Quantity  
2
2
2
2
2
2
2
2
Number of Refrigerant Circuits  
Oil (ounces) Ckt 1…Ckt 2  
85…85  
110…110  
110…110  
140…140  
REFRIGERANT TYPE  
R-22 or R-410A  
Expansion Device  
TXV  
8.1…8.1  
TXV  
TXV  
TXV  
18.0…18.0  
Operating Charge (lb) Ckt 1…Ckt 2  
9.1…9.1  
9.1…9.1  
CONDENSER (50BVC,Q,J only)  
Quantity of Manifolded Circuits  
Nominal Flow Rate (GPM)  
Tube-in-Tube Coaxial  
2
54  
2
60  
2
75  
2
90  
Water Flow Range (GPM)  
36-72  
400  
40-80  
400  
50-100  
400  
60-120  
400  
Max. Water Working Pressure (PSIG)  
Max. Refrig. Working Pressure (PSIG)  
Min. Entering Water Temp. (°F)  
Max. Entering Water Temp. (°F)  
Waterside Volume (gal)  
450 (600*)  
50  
450 (600*)  
50  
450 (600*)  
50  
450 (600*)  
50  
110  
3.6  
110  
110  
110  
6.0  
4.0  
5.0  
EVAPORATOR COIL  
Rows…Fins/in.  
Total Face Area (sq ft)  
3…14  
18.1  
3…14  
18.1  
3…14  
18.1  
3…14  
22.0  
EVAPORATOR FAN  
Quantity…Size  
2…15x15  
Belt  
2…15x15  
Belt  
2…15x15  
Belt  
2…15x15  
Type Drive  
Nominal CFM  
Belt  
7200  
8000  
10,000  
2…3…56HZ  
2…5…56HZ  
—
12,000  
Std Motor Qty…HP…Frame Size  
Alt 1 Motor Qty…HP…Frame Size  
Alt 2 Motor Qty…HP…Frame Size  
Alt 3 Motor Qty…HP…Frame Size  
Motor Nominal RPM (1.5, 2, 3, HP)  
Motor Nominal RPM (5 HP)  
Fan Drive RPM Range  
2…1.5…56  
2…2…56H  
2…3…56HZ  
2…5…56HZ  
1725  
2…2…56H  
2…3…56HZ  
2…5…56HZ  
—
2…5…56HZ  
—
—
—
—
1725  
3450  
1725  
—
3450  
3450  
3450  
Std Fan Drive (1.5, 2, 3 HP)  
Std Fan Drive (5 HP)  
Med Static Fan Drive (1.5, 2, 3 HP)  
Motor Bearing Type  
Maximum Allowable RPM  
Motor Pulley Pitch Diameter  
Std Fan Drive (1.5, 2, 3 HP)  
Std Fan Drive (5 HP)  
753-952  
967-1290  
872-1071  
Ball  
753-952  
967-1290  
872-1071  
Ball  
753-952  
967-1290  
872-1071  
Ball  
—
967-1290  
—
Ball  
1300  
1300  
1300  
1300  
3.7-4.7  
2.9-3.9  
4.3-5.3  
3.7-4.7  
2.9-3.9  
4.3-5.3  
3.7-4.7  
2.9-3.9  
4.3-5.3  
—
—
2.9-3.9  
—
Med Static Fan Drive (1.5, 2, 3 HP)  
Motor Shaft Diameter (in.) (1.5, 2 HP)  
Motor Shaft Diameter (in.) (3, 5 HP)  
Belt, Qty…Type…Length (in.)  
Std Fan Drive (1.5, 2 HP)  
Std Fan Drive (3 HP)  
5
/
5
/
—
8
8
7
/
7
/
7
/
7
/
8
8
8
8
1…B…39  
2…B…39  
2...BX…42  
1…B…40  
2…B…40  
10.1…10.9  
1…B…39  
2…B…39  
2...BX…42  
1…B…40  
2…B…40  
10.1…10.9  
—
—
2…B…39  
2...BX…42  
—
—
2...BX…42  
—
Std Fan Drive (5 HP)  
Med Static Fan Drive (1.5, 2 HP)  
Med Static Fan Drive (3 HP)  
Pulley Center Line Distance (in.)  
Speed Change Per Full Turn of  
Moveable Pulley Flange (RPM)  
Std Fan Drive (1.5, 2, 3 HP)  
Std Fan Drive (5 HP)  
2…B…40  
10.1…10.9  
—
10.1…10.9  
33  
54  
33  
1
33  
54  
33  
1
33  
54  
33  
1
—
54  
—
1
Med Static Fan Drive (1.5, 2, 3 HP)  
Fan Shaft Diameter (in.)  
HIGH PRESSURE SWITCHES (PSIG)  
Cutout  
380 (420*) 10  
300 (420*) 15  
380 (420*) 10  
300 (420*) 15  
380 (420*) 10  
300 (420*) 15  
380 (420*) 10  
300 (420*) 15  
Reset (Auto)  
LOW PRESSURE SWITCHES (PSIG)  
Cutout  
20 (40*)  
40 (60*)  
3
5
20 (40*)  
40 (60*)  
3
5
20 (40*)  
40 (60*)  
3
5
20 (40*)  
40 (60*)  
3
5
Reset (Auto)  
REMOTE REFRIGERANT CONNECTIONS  
(50BVE,K Only)  
Discharge (Hot Gas) Connection (in.) Qty…Size  
Liquid Connection (in.) Qty…Size  
2…11/8  
2…7/8  
2…11/8  
2…7/8  
2…11/8  
2…7/8  
2…11/8  
2…7/8  
RETURN AIR FILTERS  
Quantity…Size (in.)  
4…20x34.5x1  
4…20x34.5x1  
4…20x34.5x1  
4…30x34.5x1  
LEGEND  
*R-410A models.  
TXV — Thermostatic Expansion Valve  
17  
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Table 3B — Physical Data — 50BVT,U,V,W,X  
UNIT 50BVT,U,V,W,X  
NOMINAL CAPACITY (Tons)  
034  
30  
044  
40  
054  
50  
064  
60  
OPERATING WEIGHT (lb)  
50BVT,V…50BVW  
50BVU…50BVX  
2580…2645  
2420…2485  
4334…4404  
4094…4164  
5198…5298  
4938…5038  
5230…5330  
4970…5070  
COMPRESSOR  
Quantity  
Copeland Scroll  
2
2
4
4
4
4
4
4
Number of Refrigerant Circuits  
Oil (oz.)  
Circuit 1…Circuit 2  
Circuit 3…Circuit 4  
140…140  
—
110…110  
110…110  
140…140  
140…140  
140…140  
140…140  
REFRIGERANT TYPE  
Expansion Device  
Operating Charge (lb)  
Circuit 1…Circuit 2  
Circuit 3…Circuit 4  
R-22  
TXV  
TXV  
TXV  
TXV  
18.0…18.0  
—
10.0…10.0  
10.0…10.0  
18.0…18.0  
18.0…18.0  
18.0…18.0  
18.0…18.0  
CONDENSER (50BVT,V,W only)  
Quantity of Manifolded Circuits  
Nominal Flow Rate (GPM)  
Tube-in-Tube Coaxial  
2
90  
4
120  
80-160  
400  
450  
50  
4
150  
4
180  
Water Flow Range (GPM)  
60-120  
400  
450  
50  
100-200  
400  
120-240  
400  
Max. Water Working Pressure (PSIG)  
Max. Refrig. Working Pressure (PSIG)  
Min. Entering Water Temp. (°F)  
Max. Entering Water Temp. (°F)  
Waterside Volume (gal)  
450  
450  
50  
110  
50  
110  
6.0  
110  
9.0  
110  
11.3  
13.5  
EVAPORATOR COIL  
Rows…Fins/in.  
Total Face Area (sq ft)  
4…12  
23.2  
3…12  
46.4  
4…12  
46.4  
4…12  
46.4  
EVAPORATOR FAN  
Quantity…Size  
1…18x18  
Belt  
12,000  
2…18x18  
Belt  
16,000  
2…18x18  
Belt  
20,000  
2…18x18  
Belt  
24,000  
Type Drive  
Nominal CFM  
Motor Option 1 Qty…HP…Frame Size  
Motor Option 2 Qty…HP…Frame Size  
Motor Option 3 Qty…HP…Frame Size  
Motor Option 4 Qty…HP…Frame Size  
Motor Nominal RPM  
1…7.5…213T  
1…10…215T  
1…15…254T  
1…20…256T  
1750  
2…7.5…213T  
2…10…215T  
2…15…254T  
—
2…7.5…213T  
2…10…215T  
2…15…254T  
2…20…256T  
1750  
2…7.5…213T  
2…10…215T  
2…15…254T  
2…20…256T  
1750  
1750  
Fan Drive RPM Range  
Standard (7.5 HP)  
780-960  
805-991  
960-1146  
1119-1335  
Ball  
780-960  
805-991  
960-1146  
1119-1335  
Ball  
780-960  
805-991  
960-1146  
1119-1335  
Ball  
780-960  
805-991  
960-1146  
1119-1335  
Ball  
Standard (10, 15, 20 HP), Med Static (7.5 HP)  
Med Static (10, 15, 20 HP), High Static (7.5 HP)  
High Static (10, 15, 20 HP)  
Motor Bearing Type  
Maximum Allowable RPM  
1450  
1450  
1450  
1450  
Motor Pulley Pitch Diameter  
Std Fan Drive (7.5 HP)  
5.2-6.4  
4.8-6.0  
5.8-7.0  
5.8-7.0  
13/8  
5.2-6.4  
4.8-6.0  
5.8-7.0  
5.8-7.0  
13/8  
5.2-6.4  
4.8-6.0  
5.8-7.0  
5.8-7.0  
13/8  
5.2-6.4  
4.8-6.0  
5.8-7.0  
5.8-7.0  
13/8  
Std Fan Drive (10, 15, 20 HP), Med Static (7.5 HP)  
Med Static Fan Drive (10, 15, 20 HP), High Static (7.5 HP)  
High Static Fan Drive (10, 15, 20 HP)  
Motor Shaft Diameter (in.) (7.5, 10 HP)  
Motor Shaft Diameter (in.) (15, 20 HP)  
Belt, Qty…Type…Length (in.)  
15/8  
15/8  
15/8  
15/8  
Std Fan Drive (7.5 HP)  
2…B…48  
2…B…46  
2…B…48  
2…B…45  
10.2-11.4  
2...B...48  
2…B…46  
2…B…48  
2…B…45  
10.2-11.4  
2…B…48  
2…B…46  
2…B…48  
2…B…45  
10.2-11.4  
2…B…48  
2…B…46  
2…B…48  
2…B…45  
10.2-11.4  
Std Fan Drive (10, 15, 20 HP), Med Static (7.5 HP)  
Med Static Fan Drive (10, 15, 20 HP), High Static 7.5 HP)  
High Static Fan Drive (10, 15, 20 HP)  
Pulley Center Line Distance (in.)  
Speed Change Per Full Turn of Moveable Pulley Flange (RPM)  
Std Fan Drive (7.5 HP)  
36  
31  
36  
31  
36  
31  
36  
31  
Std Fan Drive (10, 15, 20 HP), Med Static (7.5 HP)  
Med Static Fan Drive (10, 15, 20 HP), High Static (7.5 HP)  
High Static Fan Drive (10, 15, 20 HP)  
Fan Shaft Diameter (in.)  
31  
31  
31  
31  
36  
36  
36  
36  
17/16  
17/16  
17/16  
17/16  
HIGH PRESSURE SWITCHES (PSIG)  
Cutout  
380 10  
300 15  
380 10  
300 15  
380 10  
300 15  
380 10  
300 15  
Reset (Auto)  
LOW PRESSURE SWITCHES (PSIG)  
Cutout  
20  
40  
3
5
20  
40  
3
5
20  
40  
3
5
20  
40  
3
5
Reset (Auto)  
REMOTE REFRIGERANT CONNECTIONS (50BVU,X Only)  
Discharge (Hot Gas) Connection (in.) Qty…Size  
Liquid Connection (in.) Qty…Size  
2…11/8  
2…7/8  
4…11/8  
4…7/8  
4…11/8  
4…7/8  
4…11/8  
4…7/8  
RETURN AIR FILTERS  
Quantity…Size (in.)  
8…17x27x4  
16…17x27x4  
16…17x27x4  
16…17x27x4  
18  
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ACOUSTICAL CONSIDERATIONS — Proper acoustical  
considerations are a critical part of every system’s design and  
operation. Each system design and installation should be  
reviewed for its own unique requirements. For job specific  
requirements, contact an acoustical consultant for guidance and  
recommendations.  
6. For VAV units only, connect the plenum tubing, coiled  
behind the VAV control panel, to the bulkhead fittings  
located in the discharge of the supply fan. This connects  
the high pressure supply to the high side of the duct high  
static pressure switch.  
CAUTION  
In general, to reduce noise, consider the following:  
• Locate mechanical room and ducts away from noise  
sensitive locations. Whenever possible, work with the  
architect to locate the equipment rooms around the  
perimeters of restrooms, hallways, fire escapes, stair  
wells, etc., to reduce noise transmission. This allows not  
only for isolation from radiated sound but also enables  
the contractor to route duct systems around sensitive  
locations.  
Remove all shipping blocks, if any, under blower housing  
or damage to the fan may occur.  
Step 3 — Install Ductwork — The VAV units must  
use a “pair of pants” configuration as shown in Fig. 15. Refer  
to the Carrier System Design Manual or ASHRAE (American  
Society of Heating, Refrigerating and Air Conditioning Engi-  
neers) standards for the recommended duct connection to unit  
with 2 fans.  
• Construct the equipment room of concrete block or use a  
double offset stud wall with interwoven insulation. Seal  
all penetrations.  
• Design the system for low total static pressure.  
• Use suitable vibration isolation pads or isolation springs  
according to the design engineer's specifications.  
• A flexible canvas duct connector is recommended on  
both the supply and return air sides of units to be  
connected to system ductwork.  
• Use a minimum of 15 ft of return ductwork between the  
last air terminal or diffuser and the unit.  
• Insulate supply and return ducts with 2-in., 3-lb density  
insulation.  
• Round duct is recommended. If rectangular ductwork is  
used, keep aspect ratios as small as possible (i.e., as close  
to square as possible).  
• Avoid any direct line of sight from return air grilles  
into the unit's return. If return air is to be ducted to an  
equipment room, an elbow should be installed within the  
equipment room.  
• Running a return air drop to near the floor of the room  
will aid in sound attenuation.  
• Do not exceed the recommended supply duct velocity of  
2,000 fpm.  
• Do not exceed the recommended return duct velocity of  
1,000 fpm.  
• Use turning vanes on 90-degree elbows.  
• Place isolation springs under each corner and under each  
compressor if utilized.  
A
B
a50-8357.eps  
ASSEMBLING MODULAR UNITS — 50BVT,U,V,W,X  
30 to 60 ton units ship in the number of pieces shown in Table  
2. Reassemble the unit. Use the loose hardware provided in the  
main air-conditioning section and the instructions below.  
1. The filter/economizer section ships bolted to the main air-  
conditioning section and can be removed in the field.  
When reattaching the filter/economizer section to the  
main air-conditioning section, place the filter side of the  
filter/economizer section facing out and away from the  
main air conditioning section.  
2. If the unit has 2 filter/economizer and 2 main air-  
conditioning sections (40 through 60 ton units), bolt the  
remaining filter/economizer section and main air-  
conditioning section together, as in Step 1.  
3. For units with 2 filter/economizer and 2 main air-  
conditioning sections, use the provided unions to assem-  
ble the water connections between the 2 additional  
sections joined in Step 2.  
NOTE: A = 11/2 to 21/2B  
Fig. 15 — Typical Fan Discharge Connections for  
Multiple Fan Units  
A supply air outlet collar and return air duct flange are pro-  
vided on all units to facilitate duct connections. Refer to dimen-  
sional drawings (Fig. 2-14) for connection sizes and locations.  
A flexible canvas duct connector is recommended on both  
supply and return air sides of the units to be connected to the  
system ductwork.  
All metal ductwork should be adequately insulated to avoid  
heat loss or gain and to prevent condensation from forming on  
the duct walls. Uninsulated ductwork is not recommended, as  
the unit's performance will be adversely affected.  
Do not connect discharge ducts directly to the blower  
outlet(s). The factory filter should be left in place on a free  
return system.  
4. For units with multiple air conditioning sections, connect  
the condensate drain hoses from the “B” side of the unit  
to the drain manifold on the “A” side of the unit.  
5. For unit sizes 044-064, connect power wiring from the  
main terminal block in the “A” side of the unit to the  
power terminal block in the “B” side of the unit.  
If the unit will be installed in a new installation, the duct  
system should be designed in accordance with the System De-  
sign Manual, Part 2 and with ASHRAE (American Society of  
Heating, Refrigeration and Air Conditioning Engineers) proce-  
dures for duct sizing. If the unit will be connected to an existing  
duct system, check that the existing duct system has the capaci-  
ty to handle the required airflow for the unit application at an  
19  
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acceptable system static pressure. If the existing duct system is  
too small, larger ductwork must be installed.  
AIRFLOW  
The duct system and diffusers should be sized to handle the  
design airflow volumes quietly. To maximize sound attenuation  
of the unit's blower(s), the supply and return air plenums should  
be insulated for a length of at least 15 ft from the unit. Direct line  
of sight from return air grilles into the unit's return should be  
avoided. If return air is to be ducted to an equipment room, an  
elbow should be installed within the equipment room. Running a  
return air drop to near the floor of the room will aid in sound  
attenuation. Avoid transmitting vibrations generated by the  
movement of air in the ducting to the walls of the building. This  
is especially important where ductwork penetrates walls. The  
maximum recommended return air velocity is 1,000 fpm. Lower  
return air velocities will result in lower sound power levels. The  
use of round supply duct plenums should be considered, as it  
will significantly reduce low frequency sound at the equipment  
room. If rectangular supply plenums are used, the aspect ratio of  
the duct should be kept as small as possible (i.e., as close to  
square as possible). The large, flat surface areas associated with  
large aspect ratio duct systems will transmit sound to the space,  
and the potential for duct-generated noise is increased. The max-  
imum recommended supply air duct velocity is 2,000 fpm.  
Units with two fans should have a properly designed “pair  
of pants” duct connection. An adequate straight length of  
ducting from the unit should be allowed before elbows are  
installed. If connecting an elbow directly to the fan outlet, a  
minimum straight length of 2 fan diameters from the fan outlet  
is recommended. Elbows should turn in the direction of fan ro-  
tation, if possible. Abrupt turns will generate air turbulence and  
excessive noise. Turning vanes should be used in all short radi-  
us bends. Ensure that ducting does not obstruct access to the  
unit for routine servicing.  
PROBE  
a50-7138ef  
TUBING  
Fig. 16 — Duct Static Pressure Probe  
(P/N 39EK20462)  
1
Use /4-in. OD approved polyethylene tubing for up to  
50 ft (3/8-in. OD for 50 to 100 ft) to connect the probe to the  
bulkhead fitting mounted above the unit display panel  
(Fig. 17). Carefully route the tubing from the probe to this  
bulkhead fitting.  
The static pressure control should be adjusted so that, at full  
airflow, all of the remote VAV terminal boxes receive the  
minimum static pressure required plus any downstream resis-  
tance. Control the system to the lowest static pressure set point  
that will satisfy airflow requirements. Lower static pressure set  
points reduce total required brake horsepower and reduce  
generated sound levels.  
DUCT HIGH-STATIC (DHS) LIMIT SWITCH (VAV  
Only) — The duct high static limit switch is a mechanical  
safety that prevents duct overpressurization. The switch is lo-  
cated on the side of the VAV low voltage control panel  
(Fig. 18) and is factory set at 3 in. wg. To make an adjustment  
using an accurate differential pressure gage, connect low side  
and high side to gage and pressure source. Place a voltmeter  
across common and normally open contacts. Rotate the adjust-  
ment knob (Fig. 19) clockwise to increase pressure setting and  
counterclockwise to decrease pressure setting. When the bot-  
DUCT STATIC PRESSURE PROBE AND TUBING (VAV  
Only) — On VAV systems, the duct static pressure sensor and  
tubing are field-mounted. The sensor tubing sensing point  
should be located near the end of the main supply trunk duct in  
a position free from turbulence effects and at least 10 duct di-  
ameters downstream and 4 duct diameters upstream from any  
major transitions or branch take-offs. Incorrectly placing the  
sensing point could result in improper operation of the entire  
VAV system.  
1
tom of the adjustment knob is approximately /8-in. from the  
switch body, the switch will trip at approximately 3 in. wg.  
IMPORTANT: Use tubing that complies with local codes.  
Improper location or installation of the supply duct pres-  
sure tubing will result in unsatisfactory unit operation and  
poor performance.  
Install the factory-supplied duct static pressure probe with  
the tip facing into the airflow. See Fig. 16.  
DUCT STATIC  
PRESSURE  
PROBE  
BULKHEAD  
FITTING  
EXPN  
EDIT  
TEST  
ALRM  
ST  
A
T
1
4
7
–
2
5
8
0
3
6
SRVC  
HIST  
SET  
SCHD  
ALGO  
9
.
CLEAR  
ENTER  
EXPN  
EDIT  
TEST  
ALRM  
STAT  
SET  
1
4
7
–
2
5
8
0
3
6
SRVC  
HIST  
WARNING  
ALARM  
ALGO  
SCHD  
LOCAL  
OFF  
REMOTE  
CLEAR  
9
.
ENTER  
WARNING  
ALARM  
a50-7267ef  
LOCAL  
OFF  
REMOTE  
Fig. 17 — Display Panel Location on Unit Front Panel  
20  
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factory-installed option. Copper is adequate for closed loop  
systems where good quality water is available. In conditions  
where scale formation or water treatment is questionable, the  
optional cupronickel heat exchanger should be used. Where the  
water is especially corrosive or could lead to excessive fouling,  
intermediate plate frame heat exchangers are recommended.  
CAUTION  
a50-8253  
Galvanized pipe or fittings are not recommended with  
50BV units due to the possibility of galvanic corrosion  
caused by dissimilar metals. When selecting piping  
materials, use only approved piping materials that meet  
applicable codes and that will handle the temperatures and  
pressures that may be experienced in the application.  
Piping systems will sweat if low temperature fluid is used  
in the system. For these applications, supply and return  
water piping should be insulated to protect from condensa-  
tion damage. The minimum recommended entering water  
temperature to the unit is 50 F.  
The unit is capable of operating with entering water temper-  
atures as low as 50 F, without the need for head pressure  
control. If the entering water temperature is expected to be  
lower, or more stable unit operation is desired, a field-supplied  
water-regulating valve may be used.  
Fig. 18 — DHS Pressure Limit Location  
This unit has multiple independent refrigerant circuits with  
separate condensers. The individual condensers are manifolded  
together on the waterside to provide easy, single-point water  
connections. In order to achieve proper head pressure control  
when a water-regulating valve is used, a temperature-actuated  
valve is recommended. This allows any of the independent  
refrigerant circuits to operate while still modulating condenser  
water flow in response to loop water temperature.  
a50-7268tf  
A glycol solution should be used if ambient temperatures  
are expected to fall below freezing or if the loop water temper-  
ature is below 50 F while operating in the reverse cycle heating  
mode (heat pump units only). Refer to Table 4, which  
lists freezing points of glycol at different concentrations. A  
minimum concentration of 20% is recommended. Water  
pressure drop will increase and unit performance will decrease  
with increasing glycol concentrations.  
Units with factory-installed waterside economizers have  
cooling water passing through the economizer and condenser  
in series while operating in the economizer mode. During  
normal operation, water bypasses the economizer coil.  
Fig. 19 — DHS Limit Switch (P/N 190060)  
Step 4 — Make Piping Connections  
CONDENSER WATER PIPING (Water-Cooled Only) —  
Always follow national and local codes when installing water  
piping to ensure a safe and proper installation. Connections to  
the unit should incorporate vibration eliminators to reduce  
noise and vibration to the building, and shutoff valves to facili-  
tate servicing.  
Table 4 — Glycol Freezing Points  
FREEZE POINT (° F)  
% GLYCOL  
Ethylene Glycol  
Proplylene Glycol  
20  
30  
40  
50  
18  
7
–7  
19  
9
–5  
–28  
–27  
Prior to connecting the unit(s) to the condenser water  
system, the system should be flushed to remove foreign  
material that could cause condenser fouling. Install a screen  
strainer with a minimum of 20 mesh ahead of the condenser  
inlet to prevent condenser fouling and internal condenser tube  
damage from foreign material.  
Supply and return water piping must be at least as large as  
the unit connections, and larger for long runs. Refer to the  
System Design Manual, Part 3, and standard piping practice,  
when sizing, planning, and routing water piping. See dimen-  
sion drawings (Fig. 2-14) for water connection sizes and  
locations.  
All manual flow valves used in the system should be of the  
ball valve design. Globe or gate valves must not be used due to  
high pressure drops and poor throttling characteristics.  
Do not exceed recommended condenser fluid flow rates  
shown in Tables 5A and 5B. Serious damage or erosion of the  
heat exchanger tubes could occur. Piping systems should not  
exceed 10 fps fluid velocities to ensure quietness and tube wall  
integrity. Refer to Tables 5A and 5B for condenser water pres-  
sure drop versus flow rate. Flow rates outside of the published  
range should not be used.  
Ball valves should be installed in the supply and return lines  
for unit isolation and water flow balancing.  
Units are furnished standard with a copper heat exchanger.  
A cupronickel heat exchanger is also available as a  
21  
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Table 5A — Condenser Pressure Drop  
50BVC,J,Q Units  
Drain lines should be pitched away from the unit with a  
minimum slope of 1/8-in. per foot and conform to all local and  
national codes.  
A trap must be installed in the condensate line to ensure free  
condensate flow (units are not internally trapped). A vertical air  
vent is sometimes required to avoid air pockets.  
SIZE 020  
SIZE 024  
Pressure Drop (ft wg)  
SIZE 028  
SIZE 034  
FLOW RATE  
(gpm)  
35  
40  
45  
50  
55  
60  
65  
70  
75  
80  
85  
90  
95  
100  
105  
110  
115  
120  
9.1  
11.2  
13.5  
15.9  
18.4  
21.1  
23.9  
27.4  
—
—
—
—
—
—
6.0  
7.5  
9.1  
10.9  
12.8  
14.8  
17.0  
19.3  
21.7  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Install a condensate-trapping drain line at the units drain  
connection. See Fig. 20 for correct drain layout.  
9.1  
10.9  
12.8  
14.9  
17.2  
19.6  
22.2  
24.9  
27.8  
30.8  
34.0  
—
—
10.8  
12.7  
14.7  
16.9  
19.2  
21.7  
24.3  
27.1  
30.0  
33.1  
36.3  
39.7  
43.2  
a39-2371ef  
P1  
—
—
—
—
—
—
—
1/2 P1  
—
Fig. 20 — Condensate Drain Layout  
LEGEND  
GPM — Flow Rate  
PD — Pressure Drop (ft wg)  
When calculating trap depth, remember that it is not the  
total static pressure but the upstream or downstream static  
resistance that is trapped against. For instance, when calculat-  
ing the trap depth for a cooling coil condensate pan, trap  
against the coil pressure drop in that coil section and any other  
pressure drops upstream of it.  
Table 5B — Condenser Pressure Drop  
50BVT,V,W Units  
SIZE 034  
SIZE 044  
Pressure Drop (ft wg)  
SIZE 054  
SIZE 064  
FLOW RATE  
(gpm)  
60  
70  
80  
8.7  
11.9  
15.5  
19.6  
24.2  
29.3  
34.9  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
8.7  
10.2  
11.8  
13.6  
15.5  
17.4  
19.6  
21.8  
24.2  
26.6  
29.2  
31.9  
34.8  
If calculating the trap depth for the cooling coil, use the total  
static pressure drop (coil plus any other components upstream  
of it) plus 1 in. (P1 = negative static pressure + 1 in.), as shown  
in Fig. 21.  
Traps must store enough condensate to prevent losing the  
drain seal at start-up. The “Minimum 1/2 P1” dimension ensures  
that enough condensate is stored.  
Drain pans should be cleaned periodically to avoid the  
build-up of dirt and bacterial growth.  
HOT WATER HEATING COIL (Optional) — A factory-installed  
one or 2-row hot water heating coil is available as an option. The  
coil is supplied with hot water from a boiler through separate pip-  
ing from the condenser water loop. All controls for heating opera-  
tion are field-supplied.  
Piping should be in accordance with accepted industry  
standards and all components rated for the system pressure  
expected. Pipe the coils so that they will drain, and provide a  
drain and vent.  
Always connect the supply to the top of the coil, and the  
return to the bottom. Refer to Fig. 2-14 for hot water supply  
and return piping locations.  
Water coils should not be subjected to entering air tempera-  
tures below 38 F to prevent coil freeze-up. If air temperatures  
across the coil are going to be below this value, use a glycol or  
brine solution. Use a solution with the lowest concentration  
that will match the coldest air expected. Excess concentrations  
will greatly reduce coil capacity.  
The return air duct system should be carefully designed to  
get adequate mixing of the return air and outdoor air streams to  
prevent cold spots on the coil that could freeze.  
6.3  
8.0  
9.9  
12.0  
14.3  
16.7  
19.4  
22.3  
25.3  
—
—
—
—
—
—
—
—
90  
—
100  
110  
120  
130  
140  
150  
160  
170  
180  
190  
200  
210  
220  
230  
240  
6.0  
7.3  
8.7  
10.2  
11.8  
13.6  
15.5  
17.4  
19.6  
21.8  
24.2  
—
—
—
—
LEGEND  
GPM — Flow Rate  
PD — Pressure Drop (ft wg)  
Pressure and temperature ports are recommended in both  
the supply and return lines for system flow balancing. These  
openings should be 5 to 10 pipe diameters from the unit water  
connections. For thorough mixing and temperature stabiliza-  
1
tion, wells in the water piping should extend at least /2 pipe  
diameter into the pipe. Measuring the condenser waterside  
pressure drop and referring to Tables 5A and 5B can help to  
properly set the water flow rate.  
Improper fluid flow due to valving, piping, or improper  
pump operation constitutes abuse that may result in voiding of  
unit warranty. The manufacturer will not be responsible for  
damages or failures resulting from improper piping design or  
piping material selection.  
EVAPORATOR CONDENSATE DRAIN — The condensate  
drain connection is 11/4-in. FPT and is located on the same side  
of the unit as the condenser water connections. See dimension  
drawings (Fig. 2-14) for exact location.  
A 2 or 3-way, field-supplied modulating control valve, or a  
simple 2-position on-off valve may be used to control water  
flow. Select the valve based on the control valve manufacturer's  
recommendations for size and temperature rating. Select the  
control valve CV based on pressure drop and flow rate through  
the coil. This information is available from the VPACBuilder  
software program or Tables 6A and 6B.  
22  
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Table 6A — Hot Water Pressure Drop  
50BVC,E,J,K,Q Units  
WATER ECONOMIZER (Optional) — The optional waterside  
economizer (pre-cooling coil) is factory-installed and piped inter-  
nally, in series with the condenser water circuit (Fig. 21). A divert-  
ing valve and factory controls are included with the option. Only  
one set of field connections needs to be made for condenser water  
and economizer water. In addition, when the unit is shipped with  
the economizer option, the economizer drain must be connected  
to a separate trap. Follow the same steps for the economizer drain  
as described for the evaporator condensate drain. An Aquastat is  
used to modulate water flow through the economizer. The control-  
ler is mounted to the low voltage control box. Electrical connec-  
tions are factory installed and wired. The remote bulb is shipped  
internal to the unit and requires field mounting. Care should be  
taken not to dent the bulb or miscalibration may occur. The  
Aquastat has a temperature range adjustment (–30 F to 100 F) and  
is field set. See Fig. 2-14 for connection locations and sizes. See  
Tables 7A and 7B for economizer waterside pressure drop data.  
SIZE 020  
SIZE 024  
Pressure Drop (ft wg)  
SIZE 028  
SIZE 034  
FLOW RATE  
(gpm)  
10  
15  
20  
25  
30  
35  
40  
45  
50  
55  
60  
65  
0.7  
1.5  
2.6  
4.0  
5.8  
7.8  
10.2  
12.9  
15.8  
—
0.7  
1.5  
2.6  
4.0  
5.8  
7.8  
10.2  
12.9  
15.8  
—
0.7  
1.5  
2.6  
4.0  
5.8  
7.8  
10.2  
12.9  
15.8  
—
—
—
—
—
0.1  
0.1  
0.1  
0.2  
0.2  
0.3  
0.3  
0.4  
—
—
—
—
—
—
LEGEND  
GPM — Flow Rate  
PD — Pressure Drop (ft wg)  
The waterside economizer can also be ordered without  
factory-installed piping or controls. This offers additional  
flexibility for specific applications. In this case, the coil is  
factory mounted, but all supply and return piping and controls  
are field supplied.  
Table 6B — Hot Water Pressure Drop  
50BVT,U,V,W,X Units  
SIZE 034  
SIZE 044  
Pressure Drop (ft wg)  
SIZE 054  
SIZE 064  
FLOW RATE  
(gpm)  
Table 7A — Economizer Pressure Drop Curve  
(ft wg), 50BVC,E,J,K,Q Units  
45  
50  
55  
60  
65  
70  
75  
80  
85  
2.4  
3.0  
3.6  
4.3  
5.0  
5.7  
6.6  
7.4  
8.4  
9.3  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.5  
3.1  
3.7  
4.4  
5.1  
5.9  
6.7  
7.6  
8.6  
9.6  
—
—
—
—
—
—
—
—
—
2.5  
3.1  
3.7  
4.4  
5.1  
5.9  
6.7  
7.6  
8.6  
9.6  
—
—
—
—
—
—
—
—
—
2.5  
3.1  
3.7  
4.4  
5.1  
5.9  
6.7  
7.6  
8.6  
9.6  
SIZE 020  
SIZE 024  
Pressure Drop (ft wg)  
SIZE 028  
SIZE 034  
FLOW RATE  
(gpm)  
35  
40  
45  
50  
55  
60  
65  
70  
75  
80  
85  
90  
95  
100  
105  
110  
115  
120  
8.9  
11.5  
14.4  
17.6  
21.1  
24.9  
29.0  
34.4  
—
—
—
—
—
—
11.0  
13.8  
16.9  
20.4  
24.1  
28.1  
32.5  
37.1  
42.1  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
16.9  
20.4  
24.1  
28.2  
32.5  
37.2  
42.1  
47.4  
52.9  
58.7  
64.9  
—
90  
3.5  
4.1  
4.7  
5.4  
6.1  
6.9  
7.7  
8.5  
9.4  
10.3  
11.3  
12.3  
13.4  
100  
110  
120  
130  
140  
150  
160  
170  
180  
—
—
—
—
—
—
—
LEGEND  
GPM — Flow Rate  
PD — Pressure Drop (ft wg)  
—
LEGEND  
Pipe sizes should be selected based on the head pressure  
available from the pump. Water velocity should not exceed  
8 fps. Design the piping system for approximately 3 ft of loss  
per 100 equivalent ft of pipe. The piping system should allow  
for expansion and minimize vibration between the unit and  
piping system.  
GPM — Flow Rate  
PD — Pressure Drop (ft wg)  
3-WAY MOTORIZED  
BALL VALVE  
a50-7269ef  
WATERSIDE  
ECONOMIZER  
COIL  
N.C.  
N.O.  
N.O.  
AQUASTAT  
MBV  
FLUID TO REFRIGERANT  
HEAT EXCHANGER  
FLUID IN  
“BULB STRAPPED  
TO FLUID” IN LINE  
(FIELD INSTALLED)  
POSITIVE SHUT-OFF SOLENOID  
VALVE FOR VARIABLE SPEED  
PUMPING SYSTEM  
(FIELD INSTALLED)  
Fig. 21 — Optional Water Economizer  
23  
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Table 7B — Economizer Pressure Drop Curve  
(ft wg), 50BVT,U,V,W,X Units  
TRAP (MUST BE  
ABOVE TOP OF  
CONDENSER COIL)  
SIZE 034  
SIZE 044  
Pressure Drop (ft wg)  
SIZE 054  
SIZE 064  
FLOW RATE  
(gpm)  
SLOPE  
TOWARD  
REMOTE  
CONDENSER  
60  
70  
80  
13.1  
17.9  
23.5  
29.8  
36.9  
44.8  
53.4  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
9.0  
11.0  
13.1  
15.4  
17.9  
20.6  
23.5  
26.6  
29.8  
33.3  
36.9  
—
—
—
—
—
—
—
13.1  
15.4  
17.9  
20.6  
23.5  
26.5  
29.8  
33.2  
36.8  
40.7  
44.7  
48.9  
53.3  
CONDENSER  
5.8  
7.3  
9.1  
11.0  
13.1  
15.4  
17.9  
20.6  
23.5  
—
—
—
—
—
—
—
—
90  
100  
110  
120  
130  
140  
150  
160  
170  
180  
190  
200  
210  
220  
230  
240  
LIQUID  
LINE  
HOT GAS  
LINE  
50BV  
UNIT  
a50-7270ef  
—
—
—
LEGEND  
GPM — Flow Rate  
PD — Pressure Drop (ft wg)  
Fig. 22 — System with Condenser  
Above Evaporator  
REMOTE REFRIGERANT PIPING (Remote Air-Cooled  
Only) — Carrier 50BVE,K,U,X units are supplied without  
condensers. To complete the installation, these units must be  
field connected to a suitable remote condenser. The 50BV units  
from 18 to 30 tons contain 2 equally sized independent refriger-  
ant circuits. Units from 40 to 60 tons have 4 separate equal ca-  
pacity refrigerant circuits. It is important that the condenser cir-  
cuiting be properly matched to the 50BV unit circuiting. Other-  
wise, unsatisfactory operation will result. Carrier will not be  
responsible for improperly matched remote condenser selec-  
tions. Recommended condenser matches are shown in Table 8.  
a50-7271ef  
50BV  
UNIT  
HOT GAS  
LINE  
Table 8 — Recommended Condenser Matches  
for 50BVE,K,U,X Units  
NO. OF  
CKTS  
CONDENSER  
CIRCUITING  
50BV  
CONDENSER(S)  
LIQUID  
LINE  
020  
024  
028  
034  
044  
054  
064  
2
2
2
2
4
4
4
09DK020 (1)  
09DK024 (1)  
09DK028 (1)  
09DK034 (1)  
09DK024 (2)  
09DK028 (2)  
09DK034 (2)  
50/50%  
50/50%  
50/50%  
SLOPE TOWARD  
CONDENSER  
50/50%  
50/50% (each)  
50/50% (each)  
50/50% (each)  
REMOTE  
CONDENSER  
Install the air-cooled condenser or condensers according to  
the installation instructions provided with the condenser(s).  
Connection locations and sizes for the hot gas and liquid lines  
on the 50BV units are shown in Fig. 2-14, 22 and 23. For  
50BV units up to 30 tons, there will be 2 hot gas lines and 2 liq-  
uid lines to install between the unit and the condenser. Above  
30 tons, 4 hot gas lines and 4 liquid lines will be installed be-  
tween the unit and the 2 condensers. Refer to the System De-  
sign Manual, Part 3 for standard refrigerant piping techniques.  
Also see the air-cooled condenser installation instructions for  
additional guidance.  
Remote air-cooled 50BV units (only) are shipped with a dry  
nitrogen holding charge. After refrigerant connections are  
made, release nitrogen, evacuate, leak test, and charge the  
system as described in Charging the System in the Mainte-  
nance section of this manual.  
Fig. 23 — System with Evaporator  
Above Condenser  
Step 5 — Complete Electrical Connections —  
Verify that electrical requirements listed on the unit nameplate  
match available power supply. The unit voltage must be within  
the range shown in Tables 9A and 9B and phases must be  
balanced within 2%. Contact the local power company for line  
voltage corrections. Never operate a motor where a phase im-  
balance in supply voltage is greater than 2%.  
24  
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For an unbalanced 3-phase supply voltage, use the follow-  
ing formula to determine the percent of voltage imbalance:  
This amount of phase imbalance is satisfactory as it is be-  
low the maximum allowable 2%.  
Percent Voltage Imbalance  
IMPORTANT: If supply voltage phase imbalance is  
more than 2%, contact the local electric utility com-  
pany immediately.  
max voltage deviation from average voltage  
= 100 x  
average voltage  
Example: Supply voltage is 460-3-60.  
POWER WIRING — Properly sized fuses or HACR (Heat-  
ing, Air Conditioning and Refrigeration) circuit breakers must  
be installed for branch circuit protection, according to the  
national and applicable local codes. See unit nameplate and  
Tables 9A and 9B for maximum overcurrent protection size.  
These units are provided with single point, main power  
supply terminal blocks. Refer to Fig. 2-14 for conduit connec-  
tion locations. Connect the power leads as indicated on the unit  
wiring diagrams (found in the Troubleshooting section) and be  
certain to connect the ground lead to the ground lug in the unit  
high voltage electrical box. Refer to Tables 9A and 9B for unit  
electrical data.  
AB = 452 V  
BC = 464 V  
AC = 455 V  
452 + 464 + 455  
Average Voltage =  
3
1371  
3
457  
=
=
Determine maximum deviation from average voltage:  
(AB) 457 – 452 = 5 V  
(BC) 464 – 457 = 7 V  
(AC) 457 – 455 = 2 V  
Maximum deviation is 7 V.  
Determine percent of voltage imbalance:  
7
457  
% Voltage Imbalance = 100 x  
= 1.53%  
Table 9A — Electrical Data — 50BVC,E,J,K,Q  
COMPRESSOR  
No. 1 No. 2  
VOLTAGE  
RANGE  
POWER  
SUPPLY  
DISCONNECT  
SIZE  
INDOOR FAN MOTOR  
NOMINAL  
VOLTAGE  
(3 Ph, 60 Hz)  
UNIT SIZE  
50BVC,E,J,K,Q  
HP  
FLA  
(ea)  
Min Max RLA LRA RLA LRA  
Qty  
MCA MOCP  
FLA  
(ea)  
1.5  
2
3
5
1.5  
2
3
5
1.5  
2
3
5
2
3
5
2
3
5
2
3
5
3
5
3
5
3
5
5.0  
6.4  
9.0  
12.2  
2.5  
3.2  
4.5  
6.1  
2.0  
2.0  
3.6  
5.4  
6.4  
9.0  
12.2  
3.2  
4.5  
6.1  
2.0  
3.6  
5.4  
9.0  
12.2  
4.5  
6.1  
3.6  
5.4  
12.2  
6.1  
5.4  
84.0  
86.8  
92.0  
98.4  
42.1  
43.5  
46.1  
49.3  
34.6  
34.6  
37.8  
41.4  
88.4  
93.6  
100.0  
48.3  
50.85  
54.05  
34.6  
37.8  
41.4  
138.6  
145.0  
55.6  
58.8  
44.1  
47.7  
157.4  
71.6  
56.9  
110  
110  
110  
110  
50  
50  
50  
50  
45  
45  
45  
45  
120  
120  
120  
60  
60  
60  
45  
45  
45  
190  
190  
70  
70  
60  
75.8  
78.6  
83.8  
90.2  
38.0  
39.4  
42.0  
45.2  
31.2  
31.2  
34.4  
38.0  
80.0  
85.2  
91.6  
43.6  
46.2  
49.4  
31.2  
34.4  
38.0  
125.2  
131.6  
50.4  
53.6  
40.0  
43.6  
142.6  
65.0  
51.8  
208/230  
460  
187  
414  
518  
253  
506  
633  
32.9 195 32.9 195  
2
020  
16.5  
13.6  
95  
80  
16.5  
13.6  
95  
2
2
575  
80  
208/230  
460  
187  
414  
518  
253  
506  
633  
33.6 225 33.6 225  
2
2
2
024  
18.6 114 18.6  
114  
80  
575  
13.6  
80  
13.6  
208/230  
460  
187  
414  
518  
253  
506  
633  
53.6 245 53.6 245  
20.7 125 20.7 125  
16.4 100 16.4 100  
2
2
2
028  
034  
575  
60  
200  
90  
208/230  
460  
575  
187  
414  
518  
253  
506  
633  
59.1 425 59.1 425  
26.4 187 26.4 187  
20.5 148 20.5 148  
2
2
2
5
5
5
70  
LEGEND  
FLA  
HP  
— Full Load Amps  
— Horsepower  
LRA  
— Locked Rotor Amps  
MCA — Minimum Circuit Amps  
MOCP — Maximum Overcurrent Protection  
RLA — Rated Load Amps  
25  
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Table 9B — Electrical Data — 50BVT,U,V,W,X  
COMPRESSOR  
No. 1 / No. 2 No. 3 / No. 4  
VOLTAGE  
RANGE  
POWER  
SUPPLY  
DISCONNECT  
SIZE  
INDOOR FAN MOTOR  
NOMINAL  
VOLTAGE  
(3 Ph, 60 Hz)  
UNIT SIZE  
50BVT,U,V,W,X  
HP  
FLA  
(ea)  
Min Max RLA  
LRA  
RLA  
LRA  
Qty  
MCA MOCP  
FLA  
(ea)  
7.5  
10  
15  
20  
7.5  
10  
15  
20  
7.5  
10  
15  
20  
7.5  
10  
15  
7.5  
10  
15  
7.5  
10  
15  
7.5  
10  
15  
20  
7.5  
10  
15  
20  
7.5  
10  
15  
20  
7.5  
10  
15  
20  
7.5  
10  
15  
20  
7.5  
10  
15  
20  
19.4  
25.8  
38.6  
49.6  
9.7  
12.9  
19.3  
24.8  
7.8  
10.3  
15.4  
19.8  
19.4  
25.8  
38.6  
9.7  
12.9  
19.3  
7.8  
10.3  
15.4  
19.4  
25.8  
38.6  
49.6  
9.7  
12.9  
19.3  
24.8  
7.8  
10.3  
15.4  
19.8  
19.4  
25.8  
38.6  
49.6  
9.7  
12.9  
19.3  
24.8  
7.8  
159.4  
165.8  
178.6  
189.6  
71.8  
75.0  
81.4  
86.9  
53.9  
56.4  
61.5  
65.9  
217.3  
230.1  
255.7  
101.0  
107.4  
120.2  
68.3  
200  
225  
225  
250  
90  
100  
100  
110  
70  
70  
80  
80  
250  
250  
250  
110  
125  
125  
80  
143.8  
150.2  
163.0  
174.0  
64.9  
68.1  
74.5  
80.0  
48.8  
51.3  
56.4  
60.8  
206.8  
219.6  
245.2  
96.2  
102.6  
115.4  
65.2  
208/230  
460  
187 253  
414 506  
518 633  
62.2  
27.6  
20.5  
376  
—
—
1
034  
044  
054  
178  
148  
—
—
—
—
1
1
575  
208/230  
460  
187 253  
414 506  
518 633  
42.0  
19.2  
12.4  
239  
125  
80  
42.0  
19.2  
12.4  
239  
125  
80  
2
2
2
575  
73.3  
83.5  
80  
90  
70.2  
80.4  
239.0  
251.8  
277.4  
299.4  
115.5  
121.9  
134.7  
145.7  
89.1  
250  
250  
300  
300  
125  
125  
150  
150  
100  
110  
110  
125  
350  
350  
400  
400  
150  
150  
150  
175  
110  
125  
125  
125  
227.2  
240.0  
265.6  
287.6  
109.8  
116.2  
129.0  
140.0  
84.8  
208/230  
460  
187 253  
414 506  
518 633  
187 253  
414 506  
518 633  
47.1  
22.6  
17.3  
62.2  
27.6  
20.5  
318  
158  
125  
376  
178  
148  
47.1  
22.6  
17.3  
62.2  
27.6  
20.5  
318  
158  
125  
376  
178  
148  
2
2
2
2
2
2
94.1  
89.8  
575  
104.3  
113.1  
303.2  
316.0  
341.6  
363.6  
136.7  
143.1  
155.9  
166.9  
102.7  
107.7  
117.9  
126.7  
100.0  
108.8  
287.6  
300.4  
326.0  
348.0  
129.8  
136.2  
149.0  
160.0  
97.6  
208/230  
460  
064  
10.3  
15.4  
19.8  
102.6  
112.8  
121.6  
575  
LEGEND  
FLA  
HP  
LRA  
— Full Load Amps  
— Horsepower  
— Locked Rotor Amps  
MCA  
— Minimum Circuit Amps  
MOCP — Maximum Overcurrent Protection  
RLA  
— Rated Load Amps  
26  
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Modular Units — For units with multiple main air-  
conditioning sections, connect the high voltage compressor  
power wiring to the line side of the high voltage terminal block  
in the second section’s high voltage electrical box. This wiring  
is located in the upper portion of the compressor compartment.  
Connect the low voltage wiring, located in the compressor  
compartment, between the two air conditioning sections using  
the quick connects provided.  
For the supply fan motor, connect the 3-phase high voltage  
wiring, coiled behind the high voltage panel, to the line side of  
the supply fan motor terminal block located in the fan compart-  
ment. For VAV units, connect the 3-phase high voltage wiring  
to the line side of VFD.  
For units with multiple fans, connect the control power  
wiring with the quick connects provided at the fan compart-  
ment junction.  
THERMOSTAT  
B
a50-7272ef  
O
TYPICAL  
UNIT  
G
C
Y2 R W1 Y1  
C
24 VAC COMMON  
O
FAN RELAY  
COMPRESSOR RELAY  
Y1  
Y2  
HEAT PUMP  
R
G
24 VAC RETURN  
2nd STAGE COMPRESSOR RELAY  
Fig. 24 — Typical Wiring 18 to 30 Ton Units  
(Two-Stage Cooling Units)  
CONTROL WIRING (CV Only) — A standard commercial  
thermostat controls constant volume units. These units turn  
compressors on or off in response to zone temperature. The  
50BV units provide 2 stages of cooling.  
50BVT,U,V044-064 Only — Units larger than 30 tons have 4  
independent refrigerant circuits.  
These units can be controlled using a standard commercial,  
2-stage thermostat. In this case, the first stage of cooling will  
turn on compressors 1 and 2, and the second stage will turn on  
compressors 3 and 4. It is also possible to have 4 stages of cool-  
ing, using a suitable field-supplied control method.  
For 2-stage thermostat wiring, refer to Fig. 25. Jumpers  
must be installed between the G and O terminals in Modules A  
and B. A field-supplied, 24-v pilot relay should be used to en-  
ergize Y2 on Module B whenever Y1 is energized on Module  
A. Similarly, a field-supplied 24-v pilot relay should be in-  
stalled to energize Y4 on Module B whenever Y3 on Module  
A is energized (Y2 stage of thermostat calls for cooling).  
50BVC,E,Q020-034 and 50BVT,U,V034 Only — These  
models have 2 independent refrigerant circuits, each capable of  
being staged independently. Thermostat wiring is connected to  
the 6-position low voltage terminal block located in the unit  
electrical box. The 50BV units have a 24-VAC control  
transformer, which provides power to the control circuit and to  
the thermostat. The thermostat connections and their functions  
are as follows:  
C
O
Transformer 24-v ac Common  
Reversing Valve (heat pumps only)  
Y1 1st Stage Compressor Contactor  
Y2 2nd Stage Compressor Contactor  
R
G
Transformer 24-v ac Hot  
Indoor Fan Contactor  
Finally, verify that transformer phasing is consistent  
between Modules A and B.  
Select an appropriate commercial thermostat that has 2 stag-  
es of cooling control. If the unit is a heat pump, make sure the  
thermostat is capable of heat pump control. Any of the  
Debonair® series commercial thermostats will meet the re-  
quirements, and are available in a variety of attractive styles, in  
programmable and non-programmable versions.  
Install the thermostat in the space where the temperature is  
being controlled, according to the instructions provided with  
the thermostat.  
REMOTE CONDENSER FAN CONTACTOR WIR-  
ING — For units up to 30 tons, one remote condenser is  
required. Install a field-supplied 24-v pilot relay (Aux relay)  
between Y1 and C. This will energize the FC contactor on the  
remote condenser whenever there is a call for cooling.  
For 40 to 60 ton units, 2 remote condensers are required. Be  
sure to make piping connections so that compressors 1 and 2 are  
connected to condenser 1, and compressors 3 and 4 are connect-  
ed to condenser 2. Use an additional set of NO (normally open)  
contacts on PR1 to energize FC1 on condenser 1, and a set of  
NO contacts on PR2 to energize FC1 on condenser 2.  
WARNING  
CONTROL WIRING (VAV Only) — The VAV units are de-  
signed to operate either with a building management system or  
stand alone (local control).  
Before wiring the thermostat to the unit, make sure that  
main power to the unit has been disconnected. Failure to  
heed this warning could result in personal injury.  
Carrier Comfort Network® Control Wiring — The CC6400  
Control Module connects to the Carrier Comfort Network  
(CCN) bus in a daisy chain arrangement. Negative pins on  
each component must be connected to respective negative pins  
and likewise positive pins on each component must be  
connected to respective positive pins. The controller signal pins  
must be wired to the signal ground pins. Wiring connections  
for CCN must be made at the 3-pin plug.  
At any baud rate (9600, 19200, 38400 baud), the number of  
controllers is limited to 239 devices maximum. Bus length may  
not exceed 4000 ft, with no more than 60 total devices on any  
1000-ft section. Optically isolated RS-485 repeaters are  
required every 1000 ft.  
To wire the thermostat:  
1. Connect the ‘C’ terminal from the 50BV unit to the ‘C’  
terminal on the thermostat.  
2. Wire the ‘Y1’ and ‘Y2’ terminals from the 50BV unit  
to the ‘Y1’ and ‘Y2’ terminals, respectively, at the  
thermostat.  
3. Make a connection between the ‘G’ terminal on the unit  
and the ‘G’ terminal on the thermostat.  
4. Attach a wire from the ‘R’ terminal at the unit to the ‘R’  
terminal at the thermostat.  
5. 50BVQ and 50BVV ONLY: If the unit is a heat pump,  
connect a final wire from terminal ‘O’ on the heat pump  
unit to the ‘W1/O/B’ terminal at the thermostat.  
Configure the thermostat for heat pump operation using  
the installation instructions provided with the thermostat.  
Set the reversing valve polarity of the thermostat to ‘O’.  
NOTE: Carrier device default is 9600 baud.  
The CCN communication bus wiring is field supplied and  
field installed. It consists of shielded 3-conductor cable with  
drain (ground) wire. The cable selected must be identical to the  
CCN communication bus wire used for the entire network. See  
Table 10 for cable recommendations.  
See Fig. 24 for typical thermostat wiring.  
27  
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FIELD-SUPPLIED THERMOSTAT  
C
O
Y1  
Y2  
R
G
PR1  
PR2  
UNIT MODULE ‘A’  
UNIT MODULE ‘B’  
C
O
Y1  
Y3  
R
G
C
O
Y2  
Y4  
R
G
a50-7273ef  
PR2  
Remote Condenser Units Only  
PR1  
(#1)  
FC1-4  
FC1-5  
PR1  
PR2  
LEGEND  
FC — Fan Contactor  
PR — Pilot Relay  
(#2) FC1-4  
FC1-5  
Fig. 25 — Typical Wiring 40 to 60 Ton Units (Two-Stage Cooling)  
Table 10 — Recommended Cables  
SUPPLY AIR TEMPERATURE SENSOR (SAT) — The sup-  
ply air temperature sensor (Fig. 29) is used to measure the  
temperature of the air leaving the unit. The sensor should be  
located in the supply air duct, about 1 ft from the unit discharge  
connection (Fig. 30). On units with 2 fans, locate the sensor ap-  
proximately 5 duct diameters downstream from “pair of pants”  
duct connection, allowing for adequate mixing of supply air.  
Mount the sensor as follows:  
1. Remove the cover of the sensor junction box.  
2. Drill a 7/16-in. hole at the selected location.  
3. Install the sensor through the hole and secure using 2  
no. 8 screws (provided). Do not overtighten.  
4. Connect the sensor to the control box. Use an 18 or  
20 AWG, 2 conductor, twisted pair cable. This cable is  
suitable for distances of up to 500 feet.  
Connect the field wires to the supply air sensor using wire  
nuts or closed end style crimp connectors. Do not cut the  
sensor leads. Use the full length of lead supplied on the sensor.  
In the control box, remove the jacket from the cable. Route  
the sensor wires over to the right hand side of the field terminal  
block (TB2). Strip the insulation back about 1/4-in. from each  
conductor. Connect the two wires to terminals 101 and 102  
(SAT) on the terminal board. Polarity is not a consideration.  
See Table 11 for resistance vs. temperature values.  
MANUFACTURER  
Alpha  
PART NUMBER  
2413 or 5463  
A22503  
American  
Belden  
Columbia  
8772  
02525  
NOTE: Conductors and drain wire must be at least 20 AWG  
(American Wire Gage), stranded, and tinned copper. Individual  
conductors must be insulated with PVC, PVC/nylon, vinyl,  
Teflon®*, or polyethylene. An aluminum/polyester 100% foil  
shield and an outer jacket of PVC, PVC/nylon, chrome vinyl,  
or Teflon with a minimum operating temperature range of  
–20 C to 60 C is required.  
The communication bus shields must be tied together at  
each system element. If the communication bus is entirely  
within one building, the resulting continuous shield must be  
connected to ground at only one single point. If the communi-  
cation bus cable exits from one building and enters another  
building, the shields must be connected to the grounds at a  
lightning suppressor in each building (one point only).  
Wiring Control Devices — Standard controls require no field  
wiring.  
Standard controls for VAV applications include: duct static  
pressure (DSP), duct high static limit switch (DHS), compres-  
sor status (CSMUX), supply fan start/stop (SF), and supply fan  
speed (SPEED).  
Field-installed devices and the factory-supplied supply air  
temperature sensor (required) will be wired to the field termi-  
nal block (TB2) provided. Refer to Fig. 26 and the following  
descriptions. This terminal is located in the control panel as  
shown in Fig. 27 and 28.  
a50-7164tf  
*Teflon is a registered trademark of E.I. du Pont de Nemours and  
Company.  
Fig. 26 — Field Terminal Block  
28  
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PCB1  
TRANS-1  
a50-7275ef  
CSMUX  
TB2  
Fig. 27 — Modular Unit VAV Control Panel  
TB2  
TRANS-1  
a39-1867t  
PCB1  
Fig. 29 — Supply/Return Air Temperature  
Sensor (P/N HH79NZ043)  
a50-7276ef  
Fig. 28 — Single-Piece Unit VAV Control Panel  
39-312d  
Fig. 30 — Supply-Air Temperature Sensor  
Installation (Unit Discharge Location)  
29  
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Table 11 — Thermistor Resistance vs Temperature  
Values for Supply-Air Temperature Sensor  
(10 Kilo- ohm)  
TEMP  
(C)  
TEMP  
(F)  
RESISTANCE  
(Ohms)  
–40  
–35  
–30  
–25  
–20  
–15  
–10  
–5  
–40  
–31  
–22  
–13  
–4  
335,651  
242,195  
176,683  
130,243  
96,974  
72,895  
55,298  
42,315  
32,651  
25,395  
19,903  
15,714  
12,494  
10,000  
8,056  
0-7274ef  
5
14  
8.00  
23  
0
32  
5
41  
10  
50  
15  
59  
20  
68  
25  
77  
30  
86  
35  
95  
6,530  
40  
104  
113  
122  
131  
140  
149  
158  
5,325  
45  
4,367  
50  
3,601  
1.00  
55  
2,985  
60  
2,487  
65  
2,082  
70  
1,752  
0.50  
0.25  
0.22  
SMOKE DETECTOR/FIRE ALARM SHUTDOWN  
(FSD) — To allow a smoke detector to shut the 50BV down,  
remove the jumper from FSD to C and wire these terminals to a  
set of normally closed contacts on the smoke detector.  
2.25  
1.25  
0.81  
ALARM (ALARM) AND WARNING (WARN) OUT-  
PUTS — Two dry contacts output a discrete signal when the  
alarm and warning lights on the display are lit. To pick up the  
alarm output signal, wire between the ALARM and ALM-CM  
terminals. To pick up the warning output signal, wire between  
the WARN and ALM-CM terminals.  
O0.187  
O0.187  
(2 HOLES)  
65º  
NOTE: All dimensions are in inches.  
REMOTE OCCUPANCY (ROCC) — The 50BV unit may  
be commanded by another control system or a twist timer to  
become occupied and run when a set of dry contacts close. In  
order for this to occur, wire the contacts to ROCC and C and  
set the Local/Off/Remote switch to REMOTE.  
RETURN AIR TEMPERATURE SENSOR (RAS) — The  
return/mixed air temperature sensor is a 5 kiloohm temperature  
sensor used as the space control point. For every degree that  
the RAS is below the set point, the supply air set point will be  
reset by the configured value in the custom configured RESET  
RATIO. Refer to Table 12 and Fig. 31.  
Fig. 31 — Return Air Temperature Sensor  
(P/N HH79NZ079)  
Wire the sensor to PCB1 connector J3, terminals 15 and 16.  
Change custom configuration as instructed in Configure the  
Custom Programming Selections section. Changing this con-  
figuration to YES changes the EWT input to be used as return  
air temperature input.  
START-UP  
Table 12 — Thermistor Resistance vs Temperature  
Values for Return-Air Temperature  
Sensor (5 kiloohm)  
General — Complete the Start-Up Checklist on page CL-1  
before attempting system start-up.  
CRANKCASE HEATERS — The 50BVT,U,V,W,X034-064  
units include crankcase heaters. Crankcase heaters are ener-  
gized as long as there is power to the unit and the compressor  
is not operating.  
Wait 24 hours before starting the compressors to permit  
warming by the crankcase heaters.  
TEMP  
(C)  
TEMP  
(F)  
RESISTANCE  
(Ohms)  
–40  
–35  
–30  
–25  
–20  
–15  
–10  
–5  
0
–40  
–31  
–22  
–13  
–4  
167,835  
121,098  
88,340  
65,121  
48,487  
36,447  
27,648  
21,157  
16,325  
12,697  
9,952  
7,857  
6,247  
5,000  
4,028  
3,265  
2,662  
2,183  
1,801  
1,493  
1,244  
1,041  
876  
5
AFTER 24 hours, continue with the procedures below.  
14  
23  
CONFIRM THE INPUT POWER PHASE SEQUENCE —  
The input power phase rotation sequence must be L1-L2-L3 =  
ABC (or forward or clockwise) as indicated with a phase  
rotation meter. Incorrect input phase rotation will cause the com-  
pressors to rotate in reverse, which results in no cooling capacity.  
32  
5
41  
10  
15  
20  
25  
30  
35  
40  
45  
50  
55  
60  
65  
70  
75  
80  
50  
59  
68  
77  
86  
95  
104  
113  
122  
131  
140  
149  
158  
167  
176  
IMPORTANT: On VAV units, fan rotation direction  
can NOT be used for the phase sequence check; fan  
rotation for VAV units with a variable speed drive is  
independent of the unit input wiring sequence.  
740  
If the compressor is rotating in the wrong direction, it may:  
emit increased noise; shut down due to internal overload  
protection; have only a small decrease in suction pressure when  
it starts; or have only a small increase in discharge pressure  
628  
30  
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when it starts. Also, no cooling will be produced at the  
evaporator. If any of these conditions occurs, refer to the  
Service section to correct the compressor rotation before  
continuing.  
INTERNAL WIRING — Check all electrical connections in  
unit control boxes; tighten as required.  
RETURN-AIR FILTERS — Check that correct filters are  
installed in filter tracks (see Tables 3A and 3B). Do not operate  
unit without return-air filters.  
COOLING — Set the space thermostat to OFF position. Turn  
on unit power. Set space thermostat to COOL and the fan to  
AUTO. Adjust the thermostat temperature setting below room  
temperature. Compressor 1 starts on closure of contactor (com-  
pressors 1 and 2 on 4-circuit units with 2-stage thermostat).  
Adjust the thermostat to an even lower setting until the ther-  
mostat energizes Y2 (the second cooling stage). Compressor 2  
starts on closure of contactor (compressors 3 and 4 on 4-circuit  
units with 2-stage thermostat).  
Adjust the thermostat temperature to a setting just below  
room temperature. The second stage of cooling should turn off.  
Set the thermostat temperature above room temperature. All  
compressors and the unit fan should now be off.  
HEATING (Heat Pump Units Only) — Follow the same se-  
quence as for cooling (above), except set the space thermostat  
to HEAT, and instead of adjusting the thermostat below room  
temperature, adjust it above. Verify that the compressors turn  
on and the unit runs in reverse cycle mode.  
COMPRESSOR MOUNTING — Compressors are internal-  
ly spring mounted. Do not loosen or remove compressor hold-  
down bolts.  
REFRIGERANT SERVICE PORTS — Each refrigerant system  
has a total of 2 Schrader-type service gage ports per circuit. One  
port is located on the suction line, and one on the compressor  
discharge line. Be sure that caps on the ports are tight.  
CV Unit Start-Up  
EVAPORATOR FAN — Fan belt and variable pitch motor  
pulleys are factory installed. See Tables 13-20 for fan perfor-  
mance data. Be sure that fans rotate in the proper direction.  
Set the thermostat below room temperature and confirm  
that the compressors and fan turn off.  
Table 13 — Fan Performance — 50BVC,E,Q020  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
0.2  
Watts  
0.4  
0.6  
0.8  
1.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
4500  
5000  
5500  
6000  
6500  
7000  
7500  
8000  
8500  
9000  
—
—
—
—
—
604  
634  
667  
700  
735  
—
—
—
—
—
774  
916  
1085  
1273  
1480  
—
—
—
—
—
0.87  
1.03  
1.22  
1.43  
1.67  
—
—
—
608  
636  
666  
693  
723  
753  
785  
—
—
—
641  
755  
906  
1057  
1226  
1423  
1638  
—
—
—
0.72  
0.85  
1.02  
1.19  
1.38  
1.60  
1.84  
623  
638  
655  
676  
699  
726  
750  
777  
804  
833  
459  
545  
0.52  
0.61  
0.72  
0.85  
0.99  
1.16  
1.34  
1.55  
1.77  
2.02  
—
—
—
—
755  
878  
1010  
1170  
1330  
1526  
1732  
1908  
—
—
—
—
—
807  
821  
841  
858  
880  
902  
927  
—
—
—
1001  
1142  
1311  
1480  
1676  
1836  
2071  
—
—
—
1.13  
1.29  
1.48  
1.67  
1.89  
2.13  
2.40  
641  
725  
742  
761  
784  
805  
829  
853  
881  
0.85  
0.99  
1.14  
1.32  
1.50  
1.72  
1.95  
2.21  
755  
878  
1029  
1189  
1377  
1573  
1745  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
1.2  
Watts  
1.4  
1.6  
1.8  
2.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
4500  
5000  
5500  
6000  
6500  
7000  
7500  
8000  
8500  
9000  
—
—
—
—
—
—
—
1283  
1451  
1629  
1781  
1989  
2233  
—
—
—
—
—
—
—
—
951  
963  
979  
997  
1018  
—
—
—
—
—
1601  
1727  
1935  
2152  
2404  
—
—
—
—
—
1.80  
2.00  
2.24  
2.50  
2.79  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1076  
1089  
1106  
—
—
—
—
—
—
—
2260  
2485  
2779  
—
—
—
—
—
—
—
2.62  
2.88  
3.18  
—
—
—
—
—
—
—
1124  
1134  
1149  
—
—
—
—
—
—
—
2422  
2697  
2960  
—
—
—
—
—
—
—
2.81  
3.09  
3.39  
—
—
881  
897  
911  
930  
950  
973  
1.44  
1.63  
1.83  
2.07  
2.31  
2.59  
—
—
—
1014  
1028  
1043  
1062  
1881  
2098  
2323  
2576  
2.18  
2.43  
2.69  
2.99  
LEGEND  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
7. Bhp values are per fan. Watts values are per motor. Unit has  
2 supply fans and 2 motors.  
NOTES:  
1. Units are available with the following motor and drive combina-  
tions: 1.5, 2, 3, 5 HP standard drive; 1.5, 2, 3 HP medium static  
drive.  
For 1.5, 2, 3 HP standard drives, the drive range is 753 to  
952 rpm. For medium static drives, the drive range is 872 to  
1071 rpm. For 5 HP standard drives, the drive range is 967 to  
1290 rpm.  
31  
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Table 14 — Fan Performance — 50BVC,E,Q024  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
0.2  
0.4  
0.6  
0.8  
1.0  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
5,000  
5,500  
6,000  
6,500  
7,000  
7,500  
8,000  
8,500  
9,000  
9,500  
10,000  
—
—
—
—
—
—
—
—
—
—
0.87  
1.03  
1.22  
1.43  
1.67  
1.93  
2.21  
—
—
—
—
—
—
638  
655  
676  
699  
726  
750  
777  
804  
833  
863  
892  
545  
641  
0.61  
0.72  
0.85  
0.99  
1.16  
1.34  
1.55  
1.77  
2.02  
2.31  
2.61  
—
—
755  
878  
—
—
—
—
—
—
—
725  
742  
761  
784  
805  
829  
853  
881  
908  
936  
0.85  
0.99  
1.14  
1.32  
1.50  
1.72  
1.95  
2.21  
2.50  
2.81  
608  
636  
666  
693  
723  
753  
785  
816  
848  
641  
0.72  
0.85  
1.02  
1.19  
1.38  
1.60  
1.84  
2.12  
2.41  
755  
807  
821  
841  
858  
880  
902  
927  
952  
978  
1001  
1142  
1311  
1480  
1676  
1836  
2071  
2323  
2624  
1.13  
1.29  
1.48  
1.67  
1.89  
2.13  
2.40  
2.69  
3.01  
—
—
755  
878  
1010  
1170  
1330  
1526  
1732  
1908  
2152  
2422  
604  
634  
667  
700  
735  
769  
802  
774  
916  
1085  
1273  
1480  
1713  
1908  
906  
1029  
1189  
1377  
1573  
1745  
1989  
2251  
1057  
1226  
1423  
1638  
1827  
2080  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
1.2  
1.4  
1.6  
1.8  
2.0  
Rpm Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm  
Watts  
Bhp  
5,000  
5,500  
6,000  
6,500  
7,000  
7,500  
8,000  
8,500  
9,000  
9,500  
10,000  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1601  
1727  
1935  
2152  
2404  
2697  
2988  
—
—
—
—
1.80  
2.00  
2.24  
2.50  
2.79  
3.09  
3.42  
—
—
—
—
—
1014  
1028  
1043  
1062  
1081  
1102  
—
—
—
—
—
1881  
2098  
2323  
2576  
2879  
3178  
—
—
—
—
—
2.18  
2.43  
2.69  
2.99  
3.30  
3.64  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
881  
897  
911  
930  
950  
973  
996  
1020  
1283  
1451  
1629  
1781  
1989  
2233  
2494  
2806  
1.44  
1.63  
1.83  
2.07  
2.31  
2.59  
2.89  
3.22  
—
951  
963  
979  
997  
1018  
1039  
1061  
—
—
—
—
—
—
1076  
1089  
1106  
1123  
1142  
2260  
2485  
2779  
3060  
3360  
2.62  
2.88  
3.18  
3.51  
3.85  
1124  
1134  
1149  
1165  
1182  
2422  
2697  
2960  
3251  
3559  
2.81  
3.09  
3.39  
3.73  
4.08  
LEGEND  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
7. Bhp values are per fan. Watts values are per motor. Unit has  
2 supply fans and 2 motors.  
NOTES:  
1. Units are available with the following motor and drive combina-  
tions: 2, 3, and 5 HP standard drive; 2, 3 HP medium static  
drive.  
For 2, 3 HP standard drives, the drive range is 753 to 952 rpm.  
For medium static drives, the drive range is 872 to 1071 rpm.  
For 5 HP standard drives, the drive range is 967 to 1290 rpm.  
32  
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Table 15 — Fan Performance — 50BVC,E,Q028  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
0.2  
0.4  
0.6  
0.8  
1.0  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
6,250  
7,000  
—
—
751  
889  
—
624  
666  
693  
723  
753  
785  
816  
848  
879  
912  
944  
976  
1010  
678  
880  
0.79  
1.02  
1.19  
1.38  
1.60  
1.84  
2.12  
2.41  
2.73  
3.08  
3.46  
3.86  
4.31  
689  
726  
750  
777  
804  
833  
863  
892  
921  
952  
983  
1014  
1046  
797  
999  
0.92  
1.16  
1.34  
1.55  
1.77  
2.02  
2.31  
2.61  
2.93  
3.29  
3.67  
4.09  
4.55  
753  
784  
805  
829  
853  
881  
908  
936  
963  
917  
1136  
1291  
1482  
1682  
1908  
2152  
2422  
2742  
3060  
3405  
3777  
4184  
1.06  
1.32  
1.50  
1.72  
1.95  
2.21  
2.50  
2.81  
3.14  
3.51  
3.90  
4.33  
4.80  
815  
841  
858  
880  
902  
927  
952  
978  
1004  
1032  
1060  
1088  
—
1045  
1273  
1437  
1627  
1836  
2071  
2323  
2624  
2924  
3251  
3605  
3985  
—
1.21  
1.48  
1.67  
1.89  
2.13  
2.40  
2.69  
3.01  
3.35  
3.73  
4.13  
4.57  
—
604  
634  
667  
700  
735  
769  
802  
835  
870  
904  
937  
972  
0.87  
1.03  
1.22  
1.43  
1.67  
1.93  
2.21  
2.53  
2.86  
3.24  
3.63  
4.07  
7,500  
1027  
1191  
1382  
1591  
1827  
2080  
2350  
2688  
3015  
3369  
3759  
1155  
1337  
1528  
1745  
1989  
2251  
2531  
2870  
3206  
3569  
3967  
8,000  
1054  
1237  
1437  
1664  
1908  
2179  
2467  
2824  
3169  
3550  
8,500  
9,000  
9,500  
10,000  
10,500  
11,000  
11,500  
12,000  
12,500  
992  
1022  
1051  
1082  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
1.2  
1.4  
Rpm Watts  
1.6  
1.8  
2.0  
Rpm Watts  
Bhp  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
6,250  
7,000  
877  
897  
911  
930  
950  
973  
996  
1020  
1044  
1070  
1097  
1124  
—
1173  
1410  
1582  
1781  
1989  
2233  
2494  
2806  
3106  
3451  
3804  
4193  
—
1.36  
1.63  
1.83  
2.07  
2.31  
2.59  
2.89  
3.22  
3.56  
3.95  
4.36  
4.81  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
951  
963  
979  
997  
1018  
1039  
1061  
1084  
1109  
1134  
—
1555  
1727  
1935  
2152  
2404  
2697  
2988  
3296  
3641  
4012  
—
1.80  
2.00  
2.24  
2.50  
2.79  
3.09  
3.42  
3.78  
4.17  
4.60  
—
7,500  
1014  
1028  
1043  
1062  
1081  
1102  
1123  
1146  
1170  
—
1881  
2098  
2323  
2576  
2879  
3178  
3496  
3840  
4221  
—
2.18  
2.43  
2.69  
2.99  
3.30  
3.64  
4.01  
4.40  
4.84  
—
8,000  
1076  
1089  
1106  
1123  
1142  
1161  
1184  
1206  
—
2260  
2485  
2779  
3060  
3360  
3686  
4049  
—
2.62  
2.88  
3.18  
3.51  
3.85  
4.23  
4.64  
—
1124  
1134  
1149  
1165  
1182  
1200  
1220  
—
2422  
2697  
2960  
3251  
3559  
3886  
4248  
—
2.81  
3.09  
3.39  
3.73  
4.08  
4.45  
4.87  
—
8,500  
9,000  
9,500  
10,000  
10,500  
11,000  
11,500  
12,000  
12,500  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
7. Bhp values are per fan. Watts values are per motor. Unit has  
2 supply fans and 2 motors.  
NOTES:  
1. Units are available with 3 or 5 HP standard drive or 3 HP  
medium static drive.  
For 3 HP standard drives, the drive range is 753 to 952 rpm.  
For medium static drives, the drive range is 872 to 1071 rpm. 5  
HP standard drives have drive range of 967 to 1290 rpm.  
33  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 16 — Fan Performance — 50BVC,E,Q034  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
0.2  
Watts  
0.4  
0.6  
0.8  
1.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
9,000  
9,500  
639  
665  
693  
721  
749  
777  
805  
835  
865  
894  
924  
1187  
1362  
1555  
1775  
2004  
2259  
2533  
2842  
3169  
3514  
3895  
1.36  
1.56  
1.78  
2.03  
2.30  
2.59  
2.90  
3.26  
3.63  
4.03  
4.46  
693  
717  
743  
769  
795  
822  
848  
877  
905  
933  
961  
1334  
1518  
1720  
1949  
2186  
2451  
2733  
3042  
3378  
3741  
4121  
1.53  
1.74  
1.97  
2.23  
2.51  
2.81  
3.13  
3.49  
3.87  
4.29  
4.72  
745  
766  
791  
815  
840  
864  
889  
917  
944  
971  
998  
1490  
1674  
1894  
2122  
2369  
2642  
2933  
3251  
3596  
3958  
4356  
1.71  
1.92  
2.17  
2.43  
2.71  
3.03  
3.36  
3.73  
4.12  
4.54  
4.99  
795  
814  
836  
859  
882  
906  
929  
955  
981  
1007  
—
1646  
1839  
2058  
2296  
2551  
2833  
3133  
3460  
3813  
4184  
—
1.89  
2.11  
2.36  
2.63  
2.92  
3.25  
3.59  
3.97  
4.37  
4.80  
—
843  
861  
881  
902  
924  
946  
968  
993  
1018  
—
1802  
2004  
2232  
2478  
2742  
3024  
3333  
3668  
4021  
—
2.07  
2.30  
2.56  
2.84  
3.14  
3.47  
3.82  
4.20  
4.61  
—
10,000  
10,500  
11,000  
11,500  
12,000  
12,500  
13,000  
13,500  
14,000  
—
—
—
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
1.2  
1.4  
Rpm Watts  
1.6  
1.8  
2.0  
Rpm Watts  
Bhp  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
Rpm Watts  
Bhp  
9,000  
9,500  
890  
906  
925  
944  
965  
985  
1006  
1030  
1053  
—
1958  
2168  
2405  
2660  
2924  
3224  
3532  
3877  
4239  
—
2.24  
2.48  
2.76  
3.05  
3.35  
3.69  
4.05  
4.44  
4.86  
—
936  
950  
967  
986  
1004  
1024  
1044  
1066  
—
2122  
2341  
2578  
2842  
3115  
3414  
3732  
4085  
—
2.43  
2.68  
2.96  
3.26  
3.57  
3.91  
4.28  
4.68  
—
982  
994  
2296  
2515  
2760  
3024  
3315  
3614  
3940  
4302  
—
2.63  
2.88  
3.16  
3.47  
3.80  
4.14  
4.52  
4.93  
—
1026  
1037  
1051  
1066  
1082  
1099  
1117  
—
2460  
2688  
2942  
3215  
3505  
3813  
4148  
—
2.82  
3.08  
3.37  
3.68  
4.02  
4.37  
4.75  
—
1071  
1079  
1092  
1105  
1120  
1136  
1152  
—
2642  
2870  
3124  
3405  
3705  
4021  
4356  
—
3.03  
3.29  
3.58  
3.90  
4.25  
4.61  
4.99  
—
10,000  
10,500  
11,000  
11,500  
12,000  
12,500  
13,000  
13,500  
14,000  
1009  
1026  
1043  
1062  
1080  
1102  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
3.  
Do not operate in shaded area.  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
7. Bhp values are per fan. Watts values are per motor. Unit has  
2 supply fans and 2 motors.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
NOTES:  
1. Unit is available with 5 HP standard drive only. The drive range  
is 967 to 1290 rpm.  
2. Italics indicates field-supplied drive required.  
34  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 17 — Fan Performance — 50BVT,U,V034  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
0.2  
Watts  
0.4  
0.6  
0.8  
1.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
9,000  
9,500  
564  
590  
617  
643  
669  
696  
722  
750  
777  
804  
832  
859  
886  
3,167  
3,666  
4,226  
4,820  
5,503  
6,236  
6,952  
7,816  
8,595 10.49  
9,572 11.68  
10,634 12.97  
11,747 14.33  
12,953 15.80  
3.76  
4.35  
5.01  
5.72  
6.53  
7.40  
8.34  
9.38  
605  
629  
655  
678  
704  
729  
754  
780  
806  
832  
859  
885  
911  
3,483  
3,999  
4,584  
5,194  
5,901  
6,577  
7,380  
8,260  
9,050 11.04  
10,043 12.25  
11,122 13.57  
12,217 14.90  
13,474 16.44  
4.13  
4.74  
5.44  
6.16  
7.00  
7.89  
8.85  
9.91  
645  
667  
691  
713  
737  
761  
784  
810  
835  
860  
886  
911  
936  
3,798  
4,331  
4,933  
5,583  
6,298  
6,987  
7,798  
8,561 10.44  
9,504 11.59  
10,514 12.83  
11,610 14.16  
12,756 15.56  
13,996 17.07  
4.51  
5.14  
5.85  
6.62  
7.47  
8.38  
9.36  
683  
704  
726  
747  
770  
792  
815  
839  
863  
887  
912  
936  
961  
4,112  
4,671  
5,282  
5,963  
6,612  
7,388  
8,225  
8,990 10.97  
9,949 12.14  
10,985 13.40  
12,097 14.76  
13,260 16.18  
14,517 17.71  
4.88  
5.54  
6.27  
7.07  
7.93  
8.86  
9.87  
718  
738  
761  
780  
802  
823  
845  
868  
891  
914  
938  
962  
986  
4,392  
4,977  
5,654  
6,263  
7,005  
7,798  
8,510 10.38  
9,427 11.50  
10,403 12.69  
11,447 13.96  
12,585 15.35  
13,765 16.79  
15,038 18.34  
5.21  
5.90  
6.71  
7.51  
8.40  
9.36  
10,000  
10,500  
11,000  
11,500  
12,000  
12,500  
13,000  
13,500  
14,000  
14,500  
15,000  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
1.2  
Watts  
1.4  
1.6  
1.8  
2.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
9,000  
9,500  
751  
771  
792  
812  
833  
854  
874  
896  
4,663  
5,264  
5,963  
6,603  
7,388  
8,199  
5.53  
6.25  
7.07  
7.92  
8.86  
9.84  
785  
802  
822  
841  
861  
882  
903  
4,933  
5,574  
6,272  
6,926  
7,720  
8,441 10.30  
9,332 11.38  
5.85  
6.61  
7.44  
8.31  
9.26  
817  
834  
852  
870  
889  
909  
930  
5,212  
5,866  
6,498  
7,240  
8,051  
8,784 10.72  
9,701 11.83  
6.18  
6.96  
7.80  
8.69  
9.66  
849  
864  
882  
899  
917  
936  
5,512  
6,166  
6,804  
7,563  
8,253 10.07  
9,127 11.13  
6.54  
7.31  
8.16  
9.07  
881  
895  
911  
927  
944  
962  
5,804  
6,394  
7,118  
7,885  
8,578 10.46  
9,469 11.55  
6.89  
7.67  
8.54  
9.46  
10,000  
10,500  
11,000  
11,500  
12,000  
12,500  
13,000  
13,500  
14,000  
14,500  
15,000  
8,921 10.88  
9,855 12.02  
955 10,060 12.27  
976 11,079 13.51  
997 12,166 14.84  
1018 13,303 16.23  
1040 14,517 17.71  
1060 15,765 19.23  
981 10,420 12.71  
1001 11,456 13.97  
1022 12,551 15.31  
1042 13,722 16.74  
1064 14,979 18.27  
1084 16,260 19.83  
924 10,283 12.54  
945 11,302 13.79  
967 12,380 15.10  
990 13,551 16.53  
1011 14,765 18.01  
1034 16,081 19.62  
951 10,702 13.06  
972 11,747 14.33  
993 12,850 15.67  
1015 14,030 17.11  
1036 15,261 18.62  
919 10,857 13.24  
941 11,918 14.54  
964 13,064 15.94  
987 14,269 17.41  
1010 15,560 18.98  
—
—
—
—
—
—
—
—
—
LEGEND  
medium-static and 7.5 HP high-static drives the drive range is  
960 to 1146 rpm. For 10, 15, 20 HP high-static drives the drive  
range is 1119 to 1335 rpm.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
NOTES:  
1. Unit is available with the following motor and drive combina-  
tions: 7.5, 10, 15, 20 HP standard drive; 7.5, 10, 15, 20 HP  
medium-static drive; 7.5, 10, 15, 20 HP high-static drive.  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
For 7.5 HP standard drives, the drive range is 780 to 960 rpm.  
For 10, 15, 20 HP standard and 7.5 HP medium-static drives,  
the drive range is 805 to 991 rpm. For 10, 15, 20 HP  
7. This unit has one supply fan and one fan motor.  
35  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 17 — Fan Performance — 50BVT,U,V034 (cont)  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
2.2  
2.4  
2.6  
2.8  
3.0  
Rpm Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
9,000  
9,500  
912  
925  
940  
955  
971  
988  
6,095  
6,690  
7,423  
8,199  
8,913 10.87  
9,812 11.97  
7.23  
8.03  
8.91  
9.84  
943  
955  
969  
982  
998  
6,324  
6,996  
7,746  
8,390 10.23  
9,238 11.27  
7.59  
8.39  
9.29  
974  
984  
997  
1010  
1024  
6,629  
7,310  
8,060  
8,715 10.63  
9,572 11.68  
7.95  
8.77  
9.67  
1005  
1013  
1025  
1037  
1050  
6,943  
7,624  
8,253 10.07  
9,041 11.03  
9,915 12.09  
8.33  
9.15  
1035  
1042  
1053  
1063  
7,266  
7,955  
8,578 10.46  
9,375 11.44  
8.72  
9.54  
10,000  
10,500  
11,000  
11,500  
12,000  
12,500  
13,000  
13,500  
14,000  
14,500  
15,000  
1076 10,257 12.51  
1090 11,207 13.67  
1104 12,217 14.90  
1121 13,320 16.25  
1138 14,492 17.68  
1155 15,731 19.19  
—
—
—
1014 10,155 12.39  
1031 11,130 13.58  
1050 12,191 14.87  
1069 13,320 16.25  
1088 14,526 17.72  
1108 15,816 19.29  
1040 10,506 12.82  
1056 11,490 14.02  
1074 12,568 15.33  
1092 13,714 16.73  
1110 14,927 18.21  
1131 16,235 19.80  
1065 10,848 13.23  
1080 11,849 14.45  
1097 12,944 15.79  
1115 14,098 17.20  
1133 15,329 18.70  
—
—
—
1006 10,771 13.14  
1025 11,824 14.42  
1045 12,936 15.78  
1065 14,124 17.23  
1086 15,397 18.78  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
3.2  
Watts  
7,606  
8,286  
8,904 10.86  
9,718 11.85  
3.4  
Watts  
7,946  
3.6  
Watts  
—
3.8  
Watts  
—
4.0  
Watts  
—
Rpm  
Bhp  
9.13  
9.94  
Rpm  
Bhp  
9.53  
Rpm  
—
Bhp  
—
Rpm  
—
Bhp  
—
Rpm  
—
1185  
Bhp  
—
9,000  
9,500  
1065  
1071  
1081  
1090  
1095  
1100  
1108  
8,493 10.36  
9,247 11.28  
1128  
1136  
8,835 10.78  
9,598 11.71  
1157  
1163  
9,195 11.22  
9,958 12.15  
9,564 11.67  
10,000  
10,500  
11,000  
11,500  
12,000  
12,500  
13,000  
13,500  
14,000  
14,500  
15,000  
1190 10,326 12.60  
1195 11,139 13.59  
1203 12,046 14.69  
1212 13,038 15.90  
1223 14,090 17.19  
1236 15,235 18.58  
1116 10,060 12.27  
1127 10,959 13.37  
1139 11,918 14.54  
1152 12,953 15.80  
1167 14,073 17.17  
1183 15,269 18.63  
1143 10,411 12.70  
1153 11,319 13.81  
1164 12,286 14.99  
1176 13,329 16.26  
1190 14,457 17.64  
1205 15,662 19.11  
1169 10,771 13.14  
1178 11,678 14.25  
1188 12,653 15.43  
1200 13,705 16.72  
1213 14,850 18.12  
1227 16,064 19.60  
1102 10,608 12.94  
1115 11,558 14.10  
1128 12,585 15.35  
1144 13,697 16.71  
1160 14,876 18.15  
1177 16,132 19.68  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
medium-static and 7.5 HP high-static drives the drive range is  
960 to 1146 rpm. For 10, 15, 20 HP high-static drives the drive  
range is 1119 to 1335 rpm.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
NOTES:  
1. Unit is available with the following motor and drive combina-  
tions: 7.5, 10, 15, 20 HP standard drive; 7.5, 10, 15, 20 HP  
medium-static drive; 7.5, 10, 15, 20 HP high-static drive.  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
For 7.5 HP standard drives, the drive range is 780 to 960 rpm.  
For 10, 15, 20 HP standard and 7.5 HP medium-static drives,  
the drive range is 805 to 991 rpm. For 10, 15, 20 HP  
7. This unit has one supply fan and one fan motor.  
36  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 18 — Fan Performance — 50BVT,U,V044  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
0.2  
Watts  
0.4  
0.6  
0.8  
1.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
12,000  
12,500  
13,000  
13,500  
14,000  
14,500  
15,000  
16,000  
17,000  
17,500  
18,000  
19,000  
19,500  
403  
413  
423  
436  
446  
459  
469  
495  
518  
531  
543  
568  
580  
1057  
1173  
1280  
1422  
1546  
1706  
1847  
2200  
2570  
2781  
3001  
3474  
3728  
1.25  
1.39  
1.52  
1.69  
1.83  
2.02  
2.19  
2.61  
3.05  
3.30  
3.56  
4.12  
4.42  
461  
470  
478  
489  
498  
509  
518  
541  
562  
573  
584  
607  
619  
1271  
1395  
1520  
1661  
1803  
1962  
2121  
2482  
2878  
3097  
3325  
3815  
4077  
1.51  
1.66  
1.80  
1.97  
2.14  
2.33  
2.52  
2.94  
3.41  
3.67  
3.94  
4.53  
4.84  
512  
519  
527  
537  
546  
557  
565  
585  
604  
614  
625  
646  
657  
1458  
1591  
1723  
1883  
2033  
2209  
2385  
2772  
3176  
3404  
3640  
4147  
4418  
1.73  
1.89  
2.04  
2.23  
2.41  
2.62  
2.83  
3.29  
3.77  
4.04  
4.32  
4.92  
5.24  
561  
567  
573  
582  
589  
599  
607  
627  
645  
654  
664  
684  
693  
1644  
1785  
1927  
2086  
2253  
2438  
2614  
3036  
3474  
3710  
3955  
4488  
4767  
1.95  
2.12  
2.29  
2.47  
2.67  
2.89  
3.10  
3.60  
4.12  
4.40  
4.69  
5.32  
5.66  
608  
613  
618  
626  
632  
640  
647  
665  
681  
691  
700  
720  
729  
1838  
1980  
2130  
2297  
2465  
2658  
2843  
3272  
3736  
3990  
4252  
4820  
5107  
2.18  
2.35  
2.53  
2.73  
2.92  
3.15  
3.37  
3.88  
4.43  
4.73  
5.04  
5.72  
6.06  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
1.2  
Watts  
1.4  
1.6  
1.8  
2.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
12,000  
12,500  
13,000  
13,500  
14,000  
14,500  
15,000  
16,000  
17,000  
17,500  
18,000  
19,000  
19,500  
654  
657  
661  
668  
673  
680  
686  
702  
717  
726  
735  
753  
762  
2042  
2183  
2341  
2517  
2693  
2886  
3079  
3518  
3990  
4252  
4523  
5107  
5433  
2.42  
2.59  
2.78  
2.99  
3.19  
3.42  
3.65  
4.17  
4.73  
5.04  
5.37  
6.06  
6.45  
700  
702  
704  
709  
713  
719  
724  
739  
752  
760  
768  
785  
794  
2262  
2403  
2561  
2737  
2913  
3115  
3316  
3771  
4252  
4523  
4802  
5415  
5733  
2.68  
2.85  
3.04  
3.25  
3.46  
3.69  
3.93  
4.47  
5.04  
5.37  
5.70  
6.42  
6.80  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
834  
836  
844  
853  
859  
865  
878  
885  
—
—
—
—
—
—
—
—
—
4.33  
4.57  
5.11  
5.70  
6.02  
6.37  
7.09  
7.48  
745  
746  
750  
753  
758  
762  
774  
786  
794  
801  
816  
825  
2640  
2790  
2974  
3150  
3351  
3553  
4016  
4514  
4793  
5072  
5707  
6033  
3.13  
3.31  
3.53  
3.74  
3.98  
4.21  
4.76  
5.36  
5.69  
6.02  
6.77  
7.16  
791  
792  
796  
799  
810  
820  
827  
833  
848  
855  
3220  
3395  
3605  
3806  
4278  
4785  
5064  
5371  
5998  
6263  
3.82  
4.03  
4.28  
4.52  
5.08  
5.68  
6.01  
6.37  
7.12  
7.51  
—
3859  
4069  
4540  
5055  
5353  
5662  
6298  
6568  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
2.2  
Watts  
2.4  
2.6  
2.8  
3.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
12,000  
12,500  
13,000  
13,500  
14,000  
14,500  
15,000  
16,000  
17,000  
17,500  
18,000  
19,000  
19,500  
—
—
—
—
—
871  
872  
879  
886  
891  
897  
908  
915  
—
—
—
—
—
—
—
—
—
4.90  
5.15  
5.71  
6.35  
6.70  
7.05  
7.83  
8.24  
—
—
—
—
—
—
—
913  
919  
923  
928  
938  
944  
—
—
—
—
—
—
—
5099  
5645  
5936  
6245  
6830  
7170  
—
—
—
—
—
—
—
6.05  
6.70  
7.04  
7.41  
8.19  
8.60  
—
—
—
—
—
—
—
947  
951  
955  
959  
968  
973  
—
—
—
—
—
—
—
5415  
5945  
6245  
6481  
7135  
7484  
—
—
—
—
—
—
—
6.42  
7.05  
7.41  
7.78  
8.56  
8.98  
—
—
—
—
—
—
—
980  
983  
986  
989  
997  
1002  
—
—
—
—
—
—
—
5724  
6254  
6481  
6786  
7449  
7807  
—
—
—
—
—
—
—
6.79  
7.42  
7.78  
8.14  
8.94  
9.37  
—
—
—
—
—
—
—
—
1015  
1017  
1020  
1027  
1031  
—
—
—
—
—
—
—
—
6507  
6795  
7109  
7772  
8129  
—
—
—
—
—
—
—
—
7.81  
8.15  
8.53  
9.32  
9.75  
—
4130  
4340  
4811  
5353  
5645  
5945  
6525  
6865  
LEGEND  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
7. Bhp values are per fan. Watts values are per motor. Unit has  
2 supply fans and 2 motors.  
NOTES:  
1. Unit is available with the following motor and drive com-  
binations: 7.5, 10, 15 HP standard drive; 7.5, 10, 15 HP  
medium-static drive; 7.5, 10, 15 HP high-static drive.  
For 7.5 HP standard drives, the drive range is 780 to 960 rpm.  
For 10, 15 HP standard and 7.5 HP medium-static drives, the  
drive range is 805 to 991 rpm. For 10, 15 HP medium-static and  
7.5 HP high-static drives the drive range is 960 to 1146 rpm.  
For 10, 15 HP high-static drives the drive range is 1119 to  
1335 rpm.  
37  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 19 — Fan Performance — 50BVT,U,V054  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
0.2  
Watts  
0.4  
0.6  
0.8  
1.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
15,000  
16,000  
17,000  
18,000  
18,500  
19,000  
19,500  
20,000  
20,500  
21,000  
22,000  
23,000  
24,000  
489  
513  
540  
564  
578  
590  
604  
617  
629  
643  
669  
696  
722  
1953  
2315  
2728  
3167  
3413  
3666  
3938  
4226  
4505  
4820  
5503  
6236  
6952  
2.32  
2.75  
3.24  
3.76  
4.05  
4.35  
4.67  
5.01  
5.34  
5.72  
6.53  
7.40  
8.34  
537  
559  
583  
605  
618  
629  
642  
655  
665  
678  
704  
729  
754  
2227  
2596  
3027  
3483  
3745  
3999  
4278  
4584  
4872  
5194  
5901  
6577  
7380  
2.64  
3.08  
3.59  
4.13  
4.44  
4.74  
5.08  
5.44  
5.78  
6.16  
7.00  
7.89  
8.85  
582  
603  
624  
645  
657  
667  
679  
691  
701  
713  
737  
761  
784  
2473  
2878  
3325  
3798  
4069  
4331  
4628  
4933  
5238  
5583  
6298  
6987  
7798  
2.93  
3.41  
3.94  
4.51  
4.83  
5.14  
5.49  
5.85  
6.21  
6.62  
7.47  
8.38  
9.36  
623  
642  
663  
683  
694  
704  
715  
726  
736  
747  
770  
792  
815  
2711  
3132  
3605  
4112  
4392  
4671  
4968  
5282  
5618  
5963  
6612  
7388  
8225  
3.22  
3.72  
4.28  
4.88  
5.21  
5.54  
5.89  
6.27  
6.67  
7.07  
7.93  
8.86  
9.87  
663  
680  
699  
718  
729  
738  
749  
761  
770  
780  
802  
823  
845  
2939  
3369  
3868  
4392  
4680  
4977  
5299  
5654  
5980  
6263  
7005  
7798  
8510  
3.49  
4.00  
4.59  
5.21  
5.55  
5.90  
6.29  
6.71  
7.09  
7.51  
8.40  
9.36  
10.38  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
1.2  
Watts  
1.4  
1.6  
1.8  
2.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
15,000  
16,000  
17,000  
18,000  
18,500  
19,000  
19,500  
20,000  
20,500  
21,000  
22,000  
23,000  
24,000  
701  
717  
734  
751  
762  
771  
781  
792  
801  
812  
833  
854  
874  
3167  
3623  
4121  
4663  
4968  
5264  
5618  
5963  
6307  
6603  
7388  
8199  
8921  
3.76  
4.30  
4.89  
5.53  
5.89  
6.25  
6.67  
7.07  
7.48  
7.92  
8.86  
9.84  
10.88  
739  
753  
769  
785  
794  
802  
812  
822  
831  
841  
861  
882  
903  
3413  
3868  
4383  
4933  
5247  
5574  
5919  
6272  
6542  
6926  
7720  
8441  
9332  
4.05  
4.59  
5.20  
5.85  
6.22  
6.61  
7.02  
7.44  
7.85  
8.31  
9.26  
10.30  
11.38  
777  
789  
803  
817  
826  
834  
843  
852  
860  
870  
889  
909  
930  
3658  
4121  
4645  
5212  
5548  
5866  
6219  
6498  
6856  
7240  
8051  
8784  
9701  
4.34  
4.89  
5.51  
6.18  
6.58  
6.96  
7.38  
7.80  
8.23  
8.69  
9.66  
10.72  
11.83  
814  
824  
837  
849  
857  
864  
873  
882  
890  
899  
917  
936  
955  
3,911  
4,383  
4,915  
5,512  
5,839  
6,166  
6,446  
6,804  
7,170  
7,563  
4.64  
5.20  
5.83  
6.54  
6.93  
7.31  
7.73  
8.16  
8.60  
9.07  
850  
858  
870  
881  
889  
895  
903  
911  
918  
927  
944  
962  
981  
4,174  
4,654  
5,194  
5,804  
6,130  
6,394  
6,743  
7,118  
7,484  
7,885  
4.95  
5.52  
6.16  
6.89  
7.27  
7.67  
8.09  
8.54  
8.98  
9.46  
8,253 10.07  
9,127 11.13  
10,060 12.27  
8,578 10.46  
9,469 11.55  
10,420 12.71  
LEGEND  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
7. Bhp values are per fan. Watts values are per motor. Unit has  
2 supply fans and 2 motors.  
NOTES:  
1. Unit is available with the following motor and drive com-  
binations: 7.5, 10, 15, 20 HP standard drive; 7.5, 10, 15, 20 HP  
medium-static drive; 7.5, 10, 15, 20 HP high-static drive.  
For 7.5 HP standard drives, the drive range is 780 to 960 rpm.  
For 10, 15, 20 HP standard and 7.5 HP medium-static drives,  
the drive range is 805 to 991 rpm. For 10, 15, 20 HP medium-  
static and 7.5 HP high-static drives the drive range is 960 to  
1146 rpm. For 10, 15, 20 HP high-static drives the drive range  
is 1119 to 1335 rpm.  
38  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 19 — Fan Performance — 50BVT,U,V054 (cont)  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
2.2  
Watts  
2.4  
2.6  
2.8  
3.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
15,000  
16,000  
17,000  
18,000  
18,500  
19,000  
19,500  
20,000  
20,500  
21,000  
22,000  
23,000  
24,000  
886  
893  
903  
912  
919  
925  
932  
940  
946  
955  
971  
988  
4,444  
4,924  
5,495  
6,095  
6,359  
6,690  
7,048  
7,423  
7,798  
8,199  
5.27  
5.84  
6.52  
7.23  
7.63  
8.03  
8.46  
8.91  
9.36  
9.84  
922  
927  
935  
943  
950  
955  
962  
969  
975  
982  
998  
4,741  
5,212  
5,795  
6,324  
6,664  
6,996  
7,362  
7,746  
8,121  
5.62  
6.18  
6.87  
7.59  
8.00  
8.39  
8.83  
9.29  
9.74  
958  
961  
967  
974  
980  
984  
991  
997  
5,046  
5,539  
6,095  
6,629  
6,970  
7,310  
7,676  
8,060  
5.99  
6.57  
7.23  
7.95  
8.36  
8.77  
9.21  
9.67  
993  
994  
999  
5,380  
5,857  
6,341  
6,943  
7,284  
7,624  
7,999  
8,253 10.07  
8,630 10.53  
9,041 11.03  
9,915 12.09  
6.38  
6.95  
7.61  
8.33  
8.74  
9.15  
9.60  
—
—
—
—
—
—
8.00  
8.72  
9.13  
9.54  
9.99  
1031  
1035  
1039  
1042  
1047  
1053  
1057  
1063  
6,664  
7,266  
7,606  
7,955  
8,330  
8,578 10.46  
8,955 10.92  
9,375 11.44  
1005  
1010  
1013  
1019  
1025  
1030  
1037  
1050  
1003  
1010  
1024  
8,304 10.13  
8,715 10.63  
9,572 11.68  
8,390 10.23  
9,238 11.27  
8,913 10.87  
9,812 11.97  
1076 10,257 12.51  
1090 11,207 13.67  
1104 12,217 14.90  
1014 10,155 12.39  
1031 11,130 13.58  
1040 10,506 12.82  
1056 11,490 14.02  
1065 10,848 13.23  
1080 11,849 14.45  
1006 10,771 13.14  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
3.2  
Watts  
3.4  
3.6  
3.8  
4.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
15,000  
16,000  
17,000  
18,000  
18,500  
19,000  
19,500  
20,000  
20,500  
21,000  
22,000  
23,000  
24,000  
—
—
—
—
—
—
8.40  
9.13  
9.53  
9.94  
—
—
—
—
—
—
8.82  
9.53  
9.94  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1185  
1187  
—
—
—
—
—
—
—
—
—
—
1062  
1065  
1069  
1071  
1076  
1081  
1084  
1090  
7,005  
7,606  
7,946  
8,286  
8,518 10.39  
8,904 10.86  
9,298 11.34  
9,718 11.85  
1093  
1095  
1098  
1100  
1104  
1108  
1112  
7,353  
7,946  
8,286  
8,493 10.36  
8,861 10.81  
9,247 11.28  
9,641 11.76  
—
—
1127  
1128  
1132  
1136  
1138  
8,501 10.37  
8,835 10.78  
9,212 11.24  
9,598 11.71  
9,992 12.19  
1156  
1157  
1159  
1163  
8,861 10.81  
9,195 11.22  
9,572 11.68  
9,958 12.15  
9,564 11.67  
9,932 12.12  
1190 10,326 12.60  
1191 10,711 13.07  
1195 11,139 13.59  
1203 12,046 14.69  
1212 13,038 15.90  
1223 14,090 17.19  
1165 10,343 12.62  
1169 10,771 13.14  
1178 11,678 14.25  
1188 12,653 15.43  
1200 13,705 16.72  
1116 10,060 12.27  
1127 10,959 13.37  
1139 11,918 14.54  
1152 12,953 15.80  
1143 10,411 12.70  
1153 11,319 13.81  
1164 12,286 14.99  
1176 13,329 16.26  
1102 10,608 12.94  
1115 11,558 14.10  
1128 12,585 15.35  
LEGEND  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
7. Bhp values are per fan. Watts values are per motor. Unit has  
2 supply fans and 2 motors.  
NOTES:  
1. Unit is available with the following motor and drive combina-  
tions: 7.5, 10, 15, 20 HP standard drive; 7.5, 10, 15, 20 HP  
medium-static drive; 7.5, 10, 15, 20 HP high-static drive.  
For 7.5 HP standard drives, the drive range is 780 to 960 rpm.  
For 10, 15, 20 HP standard and 7.5 HP medium-static drives,  
the drive range is 805 to 991 rpm. For 10, 15, 20 HP medium-  
static and 7.5 HP high-static drives the drive range is 960 to  
1146 rpm. For 10, 15, 20 HP high-static drives the drive range  
is 1119 to 1335 rpm.  
39  
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Table 20 — Fan Performance — 50BVT,U,V064  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
0.2  
0.4  
0.6  
0.8  
1.0  
Rpm Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
18,000  
19,000  
20,000  
21,000  
22,000  
23,000  
24,000  
25,000  
26,000  
27,000  
28,000  
29,000  
564  
590  
617  
643  
669  
696  
722  
750  
777  
804  
832  
859  
3,167  
3,666  
4,226  
4,820  
5,503  
6,236  
6,952  
7,816  
8,595 10.49  
9,572 11.68  
10,634 12.97  
11,747 14.33  
3.76  
4.35  
5.01  
5.72  
6.53  
7.40  
8.34  
9.38  
605  
629  
655  
678  
704  
729  
754  
780  
806  
832  
859  
885  
3,483  
3,999  
4,584  
5,194  
5,901  
6,577  
7,380  
8,260  
9,050 11.04  
10,043 12.25  
11,122 13.57  
12,251 14.94  
4.13  
4.74  
5.44  
6.16  
7.00  
7.89  
8.85  
9.91  
645  
667  
691  
713  
737  
761  
784  
810  
835  
860  
886  
911  
3,798  
4,331  
4,933  
5,583  
6,298  
6,987  
7,798  
8,561 10.44  
9,504 11.59  
10,514 12.83  
11,610 14.16  
12,756 15.56  
4.51  
5.14  
5.85  
6.62  
7.47  
8.38  
9.36  
683  
704  
726  
747  
770  
792  
815  
839  
863  
887  
912  
936  
4,112  
4,671  
5,282  
5,963  
6,612  
7,388  
8,225  
8,990 10.97  
9,949 12.14  
10,985 13.40  
12,097 14.76  
13,260 16.18  
4.88  
5.54  
6.27  
7.07  
7.93  
8.86  
9.87  
718  
738  
761  
780  
802  
823  
845  
868  
891  
914  
938  
962  
4,392  
4,977  
5,654  
6,263  
7,005  
7,798  
8,510 10.38  
9,427 11.50  
10,403 12.69  
11,447 13.96  
12,585 15.35  
13,765 16.79  
5.21  
5.90  
6.71  
7.51  
8.40  
9.36  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
1.2  
Watts  
1.4  
Rpm Watts  
1.6  
1.8  
Watts  
2.0  
Rpm  
Bhp  
Bhp  
Rpm Watts  
Bhp  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
18,000  
19,000  
20,000  
21,000  
22,000  
23,000  
24,000  
25,000  
26,000  
27,000  
28,000  
29,000  
751  
771  
792  
812  
833  
854  
874  
896  
919  
941  
964  
987  
4,663  
5,264  
5,963  
6,603  
7,388  
8,199  
8,921 10.88  
9,855 12.02  
10,857 13.24  
11,918 14.54  
13,064 15.94  
14,269 17.41  
5.53  
6.25  
7.07  
7.92  
8.86  
9.84  
785  
802  
822  
841  
861  
882  
903  
4,933  
5,574  
6,272  
6,926  
7,720  
8,441 10.30  
9,332 11.38  
5.85  
6.61  
7.44  
8.31  
9.26  
817  
834  
852  
870  
889  
909  
930  
5,212  
5,866  
6,498  
7,240  
8,051  
8,784 10.72  
9,701 11.83  
6.18  
6.96  
7.80  
8.69  
9.66  
849  
864  
882  
899  
917  
936  
5,512  
6,166  
6,804  
7,563  
8,253 10.07  
9,127 11.13  
6.54  
7.31  
8.16  
9.07  
881  
895  
911  
927  
944  
962  
5,804  
6,394  
7,118  
7,885  
8,578 10.46  
9,469 11.55  
6.89  
7.67  
8.54  
9.46  
955 10,060 12.27  
976 11,079 13.51  
997 12,166 14.84  
1018 13,303 16.23  
1040 14,517 17.71  
1060 15,765 19.23  
981 10,420 12.71  
1001 11,456 13.97  
1022 12,551 15.31  
1042 13,722 16.74  
1064 14,979 18.27  
1084 16,260 19.83  
924 10,283 12.54  
945 11,302 13.79  
967 12,380 15.10  
990 13,551 16.53  
1011 14,765 18.01  
951 10,702 13.06  
972 11,747 14.33  
993 12,850 15.67  
1015 14,030 17.11  
1036 15,261 18.62  
LEGEND  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
7. Bhp values are per fan. Watts values are per motor. Unit has  
2 supply fans and 2 motors.  
NOTES:  
1. Unit is available with the following motor and drive combina-  
tions: 7.5, 10, 15, 20 HP standard drive; 7.5, 10, 15, 20 HP  
medium-static drive; 7.5, 10, 15, 20 HP high-static drive.  
For 7.5 HP standard drives, the drive range is 780 to 960 rpm.  
For 10, 15, 20 HP standard and 7.5 HP medium-static drives,  
the drive range is 805 to 991 rpm. For 10, 15, 20 HP medium-  
static and 7.5 HP high-static drives the drive range is 960 to  
1146 rpm. For 10, 15, 20 HP high-static drives the drive range  
is 1119 to 1335 rpm.  
40  
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Table 20 — Fan Performance — 50BVT,U,V064 (cont)  
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
2.2  
Watts  
2.4  
2.6  
2.8  
3.0  
Rpm  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
Rpm  
Watts  
Bhp  
18,000  
19,000  
20,000  
21,000  
22,000  
23,000  
24,000  
25,000  
26,000  
27,000  
28,000  
29,000  
912  
925  
940  
955  
971  
988  
6,095  
6,690  
7,423  
8,199  
8,913 10.87  
9,812 11.97  
7.23  
8.03  
8.91  
9.84  
943  
955  
969  
982  
998  
6,324  
6,996  
7,746  
8,390 10.23  
9,238 11.27  
7.59  
8.39  
9.29  
974  
984  
997  
1010  
1024  
6,629  
7,310  
8,060  
8,715 10.63  
9,572 11.68  
7.95  
8.77  
9.67  
1005  
1013  
1025  
1037  
1050  
6,943  
7,624  
8,253 10.07  
9,041 11.03  
9,915 12.09  
8.33  
9.15  
1035  
1042  
1053  
1063  
7,266  
7,955  
8,578 10.46  
9,375 11.44  
8.72  
9.54  
1076 10,257 12.51  
1090 11,207 13.67  
1104 12,217 14.90  
1121 13,320 16.25  
1138 14,492 17.68  
1155 15,731 19.19  
1014 10,155 12.39  
1031 11,130 13.58  
1050 12,191 14.87  
1069 13,320 16.25  
1088 14,526 17.72  
1108 15,816 19.29  
1040 10,506 12.82  
1056 11,490 14.02  
1074 12,568 15.33  
1092 13,714 16.73  
1110 14,927 18.21  
1131 16,235 19.80  
1065 10,848 13.23  
1080 11,849 14.45  
1097 12,944 15.79  
1115 14,098 17.20  
1133 15,329 18.70  
—
—
1006 10,771 13.14  
1025 11,824 14.42  
1045 12,936 15.78  
1065 14,124 17.23  
1086 15,397 18.78  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(cfm)  
3.2  
Watts  
7,606  
8,286  
8,904 10.86  
9,718 11.85  
3.4  
Watts  
7,946  
3.6  
Watts  
—
3.8  
Watts  
—
4.0  
Watts  
—
Rpm  
Bhp  
9.13  
9.94  
Rpm  
Bhp  
9.53  
Rpm  
—
Bhp  
—
Rpm  
—
Bhp  
—
Rpm  
—
1185  
Bhp  
—
18,000  
19,000  
20,000  
21,000  
22,000  
23,000  
24,000  
25,000  
26,000  
27,000  
28,000  
29,000  
1065  
1071  
1081  
1090  
1095  
1100  
1108  
8,493 10.36  
9,247 11.28  
1128  
1136  
8,835 10.78  
9,598 11.71  
1157  
1163  
9,195 11.22  
9,958 12.15  
9,564 11.67  
1190 10,326 12.60  
1195 11,139 13.59  
1203 12,046 14.69  
1212 13,038 15.90  
1223 14,090 17.19  
1236 15,235 18.58  
1116 10,060 12.27  
1127 10,959 13.37  
1139 11,918 14.54  
1152 12,953 15.80  
1167 14,073 17.17  
1183 15,269 18.63  
1143 10,411 12.70  
1153 11,319 13.81  
1164 12,286 14.99  
1176 13,329 16.26  
1190 14,457 17.64  
1205 15,662 19.11  
1169 10,771 13.14  
1178 11,678 14.25  
1188 12,653 15.43  
1200 13,705 16.72  
1213 14,850 18.12  
1227 16,064 19.60  
1102 10,608 12.94  
1115 11,558 14.10  
1128 12,585 15.35  
1144 13,697 16.71  
1160 14,876 18.15  
1177 16,132 19.68  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
2. Italics indicates field-supplied drive required.  
3. Do not operate in shaded area.  
Bhp  
—
Brake Horsepower Input to Supply Fan  
Watts — Input Power to Supply Fan Motor  
4. Static pressure losses must be applied to external static pres-  
sure before entering the fan performance table.  
5. Interpolation is permitted, extrapolation is not.  
6. Fan performance is based on filter, unit casing and wet coil  
losses.  
7. Bhp values are per fan. Watts values are per motor. Unit has  
2 supply fans and 2 motors.  
NOTES:  
1. Unit is available with the following motor and drive combina-  
tions: 7.5, 10, 15, 20 HP standard drive; 7.5, 10, 15, 20 HP  
medium-static drive; 7.5, 10, 15, 20 HP high-static drive.  
For 7.5 HP standard drives, the drive range is 780 to 960 rpm.  
For 10, 15, 20 HP standard and 7.5 HP medium-static drives,  
the drive range is 805 to 991 rpm. For 10, 15, 20 HP medium-  
static and 7.5 HP high-static drives the drive range is 960 to  
1146 rpm. For 10, 15, 20 HP high-static drives the drive range  
is 1119 to 1335 rpm.  
41  
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9. Press  
. The display will show:  
ENTER  
VAV Unit Start-Up  
Compressor Stages  
2.00 (sizes 020-034)  
4.00 (sizes 044-064)  
PERFORM AUTOMATIC RUN TEST — The 50BVJ,K,  
W,X unit controls are programmed with an automatic run test  
that checks connection and operation of major components. To  
perform the run test:  
Verify that the control display (LID [Local Interface Dis-  
play] device/system monitor) interface cable is connected to in-  
ternal jack on main controller; that the fire alarm/shutdown  
switch input (FSD) has a factory jumper or field input; and that  
the Local/Off/Remote switch is set to the REMOTE position  
(Fig. 17).  
NOTE: When the Local/Off/Remote switch is in the  
REMOTE position, the controller time schedule is pre-set  
(from the factory) as unoccupied. This means that the unit will  
not turn on until the run test is enabled. However, if the con-  
troller schedule has already been modified in the field, and the  
current time of day is occupied, then the supply fan will start.  
The run test will shut the fan down when it begins. The run test  
will complete and then the supply fan will automatically  
restart.  
10. If the number of compressor stages displayed is incorrect,  
then enter the correct number. Input 2.00 for sizes 020-  
034 or 4.00 for sizes 044-064, then Press  
display will show:  
Compressor Stages  
2.00 (sizes 020-034)  
4.00 (sizes 044-064)  
. The  
ENTER  
STAT  
11. Press  
Hardware Points  
STAT  
. The LID display will show:  
12. Press  
again. The LID display will show:  
Software Points  
13. Press  
. The LID display will show:  
ENTER  
Compressor 1 Status  
14. Press  
6 times. The LID display will show:  
NOTE: If the Local/Off/Remote switch is in the OFF position,  
it is normal for the red alarm light on the display panel to be lit,  
indicating that the unit is disabled.  
NOTE: If the light stays on when the switch is moved to  
REMOTE, or if any other problems occur during the run test,  
refer to the Troubleshooting section of this manual.  
Factory/Field Test  
Stop  
15. Press 1 then  
Factory/Field Test  
Start  
NOTE: At this point, the yellow warning light on the display  
panel will be lit and will stay on throughout the run test. After  
each successful step, the red alarm light will blink once.  
, The LID display will show:  
ENTER  
To perform the run test:  
1. Turn unit power on.  
The LID display will show the controller identification,  
time, and date (Fig. 32):  
OMNIZONE VPAC  
hh:mm mm-dd-yy  
16. The control module will now check if there is input from  
DHS, FSD, SAT, DSP, and CSMUX.  
If the control does not receive open/closed/in range/in  
range/in range, the red alarm LED will go on and the test  
will stop.  
2. Press 3 and then  
. The LID display will show:  
SET  
Controller Password  
If the inputs are okay, the red alarm LED blinks once and  
the test continues.  
17. Next, the control forces the supply fan (SF) and all of the  
compressors (COMP) off, and waits 15 seconds.  
18. The control forces SF on and SPEED to 20 percent and  
then waits 30 seconds.  
3. Press  
. The LID display will show:  
ENTER  
Log in to Controller  
Enter Password  
NOTE: The LID display has two modes: Edit mode and  
Status/Maintenance mode. If the LID display is in Edit  
mode, then the display will only show the word “pass-  
If the VFD display shows: 12.0 Hz, the remote and auto  
LEDs blink, and the fan goes on, then the red LED on the  
control module blinks once and the test continues.  
word.” Press the  
mode.  
key to toggle to the Status  
EXPN/EDIT  
19. The control forces SF on and SPEED to 35 percent and  
then waits 30 seconds.  
Press the  
to display:  
EXPN/EDIT  
Log in to Controller  
Enter Password  
If the VFD display shows: 21.0 Hz, the remote and auto  
LEDs blink, and the fan goes on, then the red LED on the  
control module blinks once and the test continues.  
4. Key in the password and press  
.
ENTER  
20. The control forces SF off then waits 15 seconds.  
NOTE: The default password is 1111.  
5. The LID display will show:  
Log in to Controller  
If the VFD display shows: Off, the remote and auto LEDs  
are off, and the fan goes off, then the red LED on the con-  
trol module blinks once and the test continues.  
Logged In  
NOTE: The steps below will be completed for the number of  
compressors configured.  
21. The control forces CMP1 (compressor 1) on then waits  
5 seconds.  
6. Press 37  
. The display will show:  
ALGO  
Custom Program  
7. Press . The display will show:  
ENTER  
If CSMUX is not in range, the red LED will go on and the  
test will stop.  
If CSMUX is in range, the red LED blinks once and the  
test continues.  
2.0 Global Dictionary  
OMNIZONE  
8. Press  
(NOTE: Display will flash and is  
EXPN/EDIT  
now in edit mode.) The display will show:  
22. The control forces CMP1 off.  
2.0 Global Dictionary  
OMNIZONE  
42  
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a50-7425ef  
OMNIZONE VPAC  
12:00  
02-06-04  
EXPN  
EDIT  
TEST  
ALRM  
STAT  
SET  
2
5
8
0
3
6
1
4
7
–
SRVC  
HIST  
FUNCTION  
KEYS  
FUNCTION  
KEYS  
ALGO  
SCHD  
CLEAR  
9
.
OPERATIVE  
KEYS  
OPERATIVE  
KEYS  
ENTER  
NUMERIC KEYS  
Fig. 32 — LID  
23. The control forces CMP2 (compressor 2) on then waits  
5 seconds.  
NOTE: When the switch is in the OFF position, the red  
alarm LED will be lit; this is normal.  
If CSMUX is not in range, the red LED will go on and the  
test will stop.  
If CSMUX is in range, the red LED blinks once and the  
test continues.  
2. If the unit access panel (for power and controls) is still on  
the unit, remove it in order to view the control modules  
during start-up.  
3. Switch the main unit power disconnect to ON.  
24. The control forces CMP2 off.  
25. The control forces CMP3 (compressor 3) on, if config-  
ured, then waits 5 seconds.  
When power is applied to the Omnizone™ system control  
panel, the red LED on the top front of the processor module  
will flash at a rapid pace (about twice a second) for the first  
30 to 60 seconds. This rapid flash will then be replaced by a  
slower pace of about once per second.  
The green LED below the red LED will start flashing. The  
green LED indicates input/output communications for accesso-  
ry input output modules and the LID display.  
The yellow LED will flash when the controller is broadcast-  
ing CCN messages to a laptop or other computer.  
The third LED from the bottom of the controller (PCB1)  
will light.  
If CSMUX is not in range, the red LED will go on and the  
test will stop.  
If CSMUX is in range, the red LED blinks once and the  
test continues.  
26. The control forces CMP3 off.  
27. The control forces CMP4 (compressor 4) on, if config-  
ured, then waits 5 seconds.  
The LID display shows:  
Factory/Field Test  
Stop  
The LID display will show the controller identification,  
time and date as shown below.  
OMNIZONE VPAC  
hh:mm mm-dd-yy  
Both the yellow and red LEDs will go off.  
28. The control forces CMP4 off.  
29. The run test is complete.  
LOG ON TO THE LID DISPLAY — To log on to the LID  
display, perform the following procedure:  
CHECK VFD — The VFD is factory wired and programmed  
for proper operation with the unit controls; no installation or  
service adjustments are normally required. At unit start-up, the  
VFD’s LED will display “0.0 Hz.” Refer to Fig. 33.  
1. Press 3 and then  
. The LID display will show:  
SET  
Controller Password  
2. Press  
. The LID display will show:  
ENTER  
Log in to Controller  
Enter Password  
NOTE: The LID display has two modes: Edit mode and  
Status/Maintenance mode. Edit mode allows the user  
to change settings on the configurations screens. Status/  
Maintenance mode only allows the user to look at the  
settings.  
POWER UP LID DISPLAY — After completing the auto-  
matic run test, perform the following procedures to change the  
controller password, set the controller clock, configure sched-  
ules, set parameters, view settings, and view alarm history.  
1. Set the Remote/Local/Off switch on the front of the unit  
to the OFF position. This prevents operation of the fan  
and compressors while still providing power to the unit  
controls.  
43  
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VEC lamp  
RUN lamp  
MON lamp  
PRG lamp  
Lights when the inverter is  
operating. Blinks when the  
automatic acceleration/deceleration  
is operating  
Lights when the  
inverter is in  
monitor mode.  
Lights when the inverter is  
in parameter setting mode.  
Lights when sensorless  
vector operation control  
is running.  
ECN lamp  
Monitor key  
Lights whenenergy-saving  
mode is in operation.  
Displays operation  
frequency, parameters,  
and error causes.  
Charge Lamp  
CHARGE  
Indicates that high voltage is  
still present within the inverter.  
Do not open the terminal  
board cover while this is lit.  
Built-in  
potentiometer lamp  
MON ENT  
Built-in potentiometer  
Operation frequency can  
be changed when the  
built-in potentiometer lamp  
is lit.  
RUN  
STOP  
Up/down key lamp  
Pressing up or down  
key when this lamp  
is lit allows the  
Enter key  
Down key  
setting of operation  
frequency.  
STOP key  
RUN key  
RUN key lamp  
Every pressing of this key  
while the RUN key lamp is  
lit will cause a slowdown  
stop.  
Pressing this key  
while the RUN key  
lamp is lighted  
Lights when the  
RUN key is  
enabled.  
Up key  
a50-7166ef  
starts operations.  
Fig. 33 — 50BV VFD Display  
NOTE: Remember this password; write it down.  
If the LID display is in Edit mode, then the display will  
only show the word “password.” Press the  
key to toggle to the Status mode. Make sure the LID dis-  
CLEAR  
5. Press  
twice to leave the password screen and re-  
EXPN/EDIT  
turn to the default display screen.  
SET THE CLOCK — The user must be logged in to set the  
clock. To set the clock, perform the following procedure:  
play shows:  
Log in to Controller  
Enter Password  
1. Press 1 and then  
Set Clock  
. The LID display will show:  
SET  
3. Key in the password and press  
.
ENTER  
2. Press  
. The LID display will show:  
ENTER  
NOTE: The default password is 1111.  
4. The LID display will show:  
Log in to Controller  
No Maintenance  
NOTE: There is no maintenance information regarding  
setting the clock.  
Logged In  
3. Press  
Time  
. The LID display will show:  
EXPN/EDIT  
NOTE: The user will be automatically logged off after  
15 minutes of non-use.  
00:00  
CHANGE THE DEFAULT PASSWORD — To change the  
default password, perform the following procedure:  
NOTE: The password must have already been entered to per-  
form this procedure.  
4. Enter the time. The time is entered in military time (for  
example 14.59 for 2.59 pm). Press then press  
ENTER  
button. The LID display will show:  
the  
Day of Week  
1
1. Press 3 and then  
. The LID display will show:  
SET  
Controller Password  
2. Press . The LID display will show:  
5. Enter the day of week. The numbers 1 through 7 corre-  
spond to the days of the week (1 = MON, 2 = TUE,  
3 = WED, 4 = THUR, 5 = FRI, 6 = SAT, 7 = SUN). Press  
ENTER  
Log in to Controller  
Logged in  
then press  
. The LID display will show:  
ENTER  
Month  
1
3. Press  
. The LID display will show:  
EXPN/EDIT  
Password  
1111 (default password, or previous password entered)  
6. Enter the number of the corresponding month (1 through  
4. Enter the new password (up to 6 digits) and press  
12). Press  
will show:  
then press  
. The LID display  
ENTER  
. The LID display will show:  
ENTER  
Password  
Day  
1
(password just entered)  
44  
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7. Enter the day of the month. Press  
. The LID display will show:  
then press  
3. Press  
.
ENTER  
ENTER  
4. If “No Maintenance” is displayed, press  
to  
EXPN/EDIT  
Year  
95  
view the set point information. The LID display will  
show:  
8. Enter the last two digits of the current year. Press  
then press . The LID display will show:  
Occupied Lo Setpoint  
0.30 in. H2O  
ENTER  
Update Clock  
No  
This is the pressure set point below which the fan is con-  
sidered to be off.  
5. Press  
. The LID display will show:  
9. Press 1 and then  
display will flash. Press  
to update the clock. The LID  
ENTER  
CLEAR  
twice to view the de-  
Occupied Hi Setpoint  
fault display and the clock should update to the input time  
and date.  
0.40 in. H2O  
This is the pressure set point above which the fan is con-  
sidered to be on.  
The down or up arrow will also display the unoccupied  
low and high temperature set points. These values should  
be kept the same as the occupied values.  
CONFIGURE SCHEDULES — Schedules are one method  
of starting and stopping the unit at specified intervals. To con-  
figure the schedules, perform the following procedure:  
1. Press 1 and then  
. The LID display will show:  
SCHD  
6. To view set points 02-09, use the following sequence:  
Occupancy Algorithm  
Press 2 and then  
. The LID display will show:  
SCHD  
Setpoint Schedule  
Press . The LID display will show:  
2. Press  
. The LID display will show:  
ENTER  
Time Schedule  
Enter to Select  
ENTER  
Supply Fan Status  
SETPT01  
3. Press  
. If the LID display shows “MODE 0,”  
ENTER  
then the user is in Maintenance mode and the LID display  
is showing the maintenance information for the occupan-  
Press  
to scroll down to the desired set point. Press  
to select.  
ENTER  
cy schedule. Press  
to enter the configura-  
EXPN/EDIT  
tion mode. The LID display will show:  
CLEAR  
To view another point, press  
one menu level. Then press  
the desired set point and press  
once to move up  
to scroll down to  
to select.  
Manual Override Hours  
0 hours  
ENTER  
This is the first configuration for each occupancy  
algorithm and is used to put the schedule in or out of  
occupancy override for the number of hours entered.  
CLEAR  
set point configuration mode.  
7. Pressing the  
button will take the user out of the  
Set point functions are as follows:  
4. Press  
. The LID display will show:  
Setpoint 02 (VAVRESETbaseline) internally coordinates  
the supply air set point reset in several of the algorithms  
and cannot be modified.  
Period 1: Day of week  
00000000  
The eight digits represent the certain days of the week or  
holidays this period should apply to: M, Tu, W, Th, F, Sa,  
Su, and Hol, respectively. Enter a series of 0s or 1s with a  
1 corresponding to the days that this period should apply  
to and a 0 for the days that this schedule should not apply  
to. As an example, entering 11111000 would make the  
schedule apply to days Monday through Friday and not  
apply to Saturday, Sunday, or Holidays.  
Setpoint 03 (Heat/Cool Mode & Reset) is used for com-  
parison by the unit to return air, space temperature, or  
average space temperature through linkage to determine  
when to start reset of the supply air when occupied, when  
to turn on heat and disable cooling when occupied,  
and when to bring the unit on for unoccupied heating or  
cooling.  
Setpoint 05 (Supply Static Pressure) is used to set the sup-  
ply air static pressure the unit should maintain. Only the  
Occupied Low set point may be modified. The other  
values will change to the Occupied Low value shortly  
after it is modified so that all the values remain the same.  
The set point in the static pressure control algorithm will  
also follow and cannot be modified in the algorithm con-  
figuration screens.  
5. Press the  
button. The LID display will show:  
Period 1 occupied from  
00:00  
6. Input the occupancy start time for this period.  
NOTE: 12.00 represents 12:00 pm.  
7. Press the  
to input the occupied to time for period 1.  
Setpoint 06 (Supply Air Temperature) is the supply air  
temperature set point. Only the Occupied Low set  
point may be modified. The other values will change  
to the Occupied Low value shortly after it is modified  
so that all the values remain the same. The set point in  
DX VAV staging and some of the other algorithms will  
also follow and cannot be modified in the algorithm  
configuration screens.  
Table 21 lists the available controller set points and  
their default values. Refer to 50BV,XJ Controls, Opera-  
tion and Troubleshooting manual for additional set point  
descriptions.  
8. Input the days and times for periods 2 through 8 as  
required.  
CLEAR  
9. Press  
to leave the occupancy programming.  
PROGRAM SET POINTS — To program the set points, per-  
form the following procedure:  
1. Press 2 and then  
. The LID display will show:  
SCHD  
Setpoint Schedule  
2. Press  
. The LID display will show:  
ENTER  
Supply Fan Status  
SETPT01  
45  
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Table 21 — Controller Set Points  
Table 22 — Controller Hardware Points  
DESCRIPTION  
DISPLAY SCREENS  
DESCRIPTION  
VALUE UNITS STATUS FORCE  
NAME  
VALUE UNITS STATUS FORCE NAME  
DISPLAY SCREENS  
OMNIZONE:SETPT01:  
Supply fan Status  
Occupied Lo Setpoint  
Occupied Hi Setpoint  
Unoccupied Lo Setpoint  
Unoccupied Hi Setpoint  
OMNIZONE:SETPT02:  
VAVRESETbaseline  
Occupied Lo Setpoint  
Occupied Hi Setpoint  
Unoccupied Lo Setpoint  
Unoccupied Hi Setpoint  
OMNIZONE:SETPT03:  
Heat/Cool Mode & Reset  
Occupied Lo Setpoint  
Occupied Hi Setpoint  
Unoccupied Lo Setpoint  
Unoccupied Hi Setpoint  
OMNIZONE:SETPT04:  
Head Pressure Control  
Occupied Lo Setpoint  
Occupied Hi Setpoint  
Unoccupied Lo Setpoint  
Unoccupied Hi Setpoint  
OMNIZONE:SETPT05:  
Supply Static Pressure  
Occupied Lo Setpoint  
Occupied Hi Setpoint  
Unoccupied Lo Setpoint  
Unoccupied Hi Setpoint  
OMNIZONE:SETPT06:  
Supply Air Temperature  
Occupied Lo Setpoint  
Occupied Hi Setpoint  
Unoccupied Lo Setpoint  
Unoccupied Hi Setpoint  
OMNIZONE:SETPT07:  
Building Static Pressure  
Occupied Lo Setpoint  
Occupied Hi Setpoint  
Unoccupied Lo Setpoint  
Unoccupied Hi Setpoint  
OMNIZONE:SETPT08:  
BSP raw control  
Occupied Lo Setpoint  
Occupied Hi Setpoint  
Unoccupied Lo Setpoint  
Unoccupied Hi Setpoint  
OMNIZONE:SETPT09:  
Humidity Control  
Occupied Lo Setpoint  
Occupied Hi Setpoint  
Unoccupied Lo Setpoint  
Unoccupied Hi Setpoint  
OMNIZONE:HWP01-32:  
Hardware points Table 1  
0.3 in. H2O  
0.4 in. H2O  
0.3 in. H2O  
0.4 in. H2O  
OccLow  
OccHgh  
Supply Air Temperature  
Duct Static Pressure  
67  
dF  
SAT  
DSP  
0.2 in. H2O  
UnOccLow  
UnOccHgh  
Comp. Status MUX  
1.86  
Volts  
CSMUX  
FSD  
Fire Alarm/ShutDown Enable  
Cond. Water Flow Switch  
Yes  
CDWF  
ROCC  
DHS  
Remote Occupancy Disable  
Duct High Press. Switch Normal  
0
0
0
0
dF  
dF  
dF  
dF  
OccLow  
OccHgh  
UnOccLow  
UnOccHgh  
Entering Water Temp.  
Compressor 1 Relay  
Compressor 2 Relay  
Compressor 3 Relay  
Compressor 4 Relay  
Supply Fan/VFD  
69.9  
Stop  
Stop  
Stop  
Stop  
Stop  
0
Off  
Off  
77.2  
Clean  
dF  
EWT  
CMP1  
CMP2  
CMP3  
CMP4  
SF  
70  
74  
55  
85  
dF  
dF  
dF  
dF  
OccLow  
OccHgh  
UnOccLow  
UnOccHgh  
VFD Speed Signal  
Non Critical Fault  
Critical Fault  
%
SPEED  
WARN  
ALARM  
MA_RA  
FLTS  
PHASE  
RESET  
FREEZ  
SPT  
BYPAS  
PRES  
VENTR  
TRMCT  
ECONO  
MVLV  
HWV  
Mixed/Return Air Temp  
Dirty Filter Status  
dF  
Phase Loss Protection Normal  
Ext. Supply Air Reset  
0
dF  
dF  
225  
225  
225  
225  
PSIG  
PSIG  
PSIG  
PSIG  
OccLow  
OccHgh  
UnOccLow  
UnOccHgh  
Water Econ. FreezeStat Normal  
Space_Reset Sensor  
79.2  
VFD Bypass Enable Disable  
Head Pressure(Comp1) 118.76  
PSIG  
Ventilation Request  
VAV Terminals Control  
2-position/Econo Valve  
Reverse/Head Press Ctrl  
Hot Water Valve  
Close  
No  
1.5 in. H2O  
1.5 in. H2O  
1.5 in. H2O  
1.5 in. H2O  
OccLow  
OccHgh  
UnOccLow  
UnOccHgh  
0
%
%
%
100  
0
Control  
Heat Interlock Relay  
Bypass Start_Stop  
VAV Terminals Open MAX  
Off  
HIR  
BPS_S  
TRMOP  
Stop  
Close  
55  
55  
55  
55  
dF  
dF  
dF  
dF  
OccLow  
OccHgh  
UnOccLow  
UnOccHgh  
OMNIZONE:HWP33-64:  
Hardware points table 2  
Cooling Tower Sump  
Temp.  
57.5  
dF  
TWR  
Building Static Milliamp  
Condenser Leaving Water  
12.51  
70.3  
ma  
dF  
BSP  
LWT  
Indoor Air Quality 587.21  
IAQ  
0.02 in. H2O  
0.02 in. H2O  
0.02 in. H2O  
0.02 in. H2O  
OccLow  
OccHgh  
UnOccLow  
UnOccHgh  
Indoor Relative Humidity  
49.7  
76.1  
Off  
Off  
Off  
Off  
Off  
Off  
0
%
dF  
IRH  
Outdoor Air Temp.  
Heat Stage 1  
OAT  
HEAT1  
HEAT2  
HEAT3  
HEAT4  
PUMP  
TOWER  
EXH  
Heat Stage 2  
Heat Stage 3  
Heat Stage 4  
12.32  
12.32  
12.32  
12.32  
ma  
ma  
ma  
ma  
OccLow  
OccHgh  
UnOccLow  
UnOccHgh  
Pump Request  
Cooling Tower Request  
Exhaust Fan  
%
Ext. Dehumidification  
Stop  
DEHUM  
0
99  
0
%RH  
%RH  
%RH  
%RH  
OccLow  
OccHgh  
UnOccLow  
UnOccHgh  
Table 23 — Software Points  
DESCRIPTION  
DISPLAY SCREENS  
99  
VALUE UNITS STATUS FORCE  
NAME  
OMNIZONE:SWP65-96:  
Software Points  
CHECK SYSTEM PARAMETERS — To check system  
STAT  
show: “Hardware Points”. Press  
ENTER  
ware points. The user can navigate up and down through the  
Compressor 1 Status  
Compressor 2 Status  
Compressor 3 Status  
Compressor 4 Status  
Bypass Acc Panel Secure  
DX VAVRESET control  
Factory/Field Test  
Off  
Off  
Off  
Off  
No  
CLO1  
CLO2  
parameters, press the  
button. The LID display will  
to view the hard-  
CLO3  
CLO4  
BP_SAFE  
VAVRESET  
FLDTST  
BSP_IN  
TIMCLOCK  
COOLOK  
SFS  
0
dF  
points with the  
and  
keys.  
Stop  
0.03 in. H2O  
Off  
Building Static Pressure  
Time Clock  
STAT  
Press 2 and  
to display the software points. The user  
Cooling Disable  
can navigate up and down through the points with the  
keys.  
and  
Supply Fan Status  
Ok to run Fan  
Off  
No  
Control  
Control  
OKFAN  
OK Fan + Sup. Fan Stat FALSE  
Fan + Cond. Water Flow FALSE  
SF_SFS  
FAN_CDWF  
MODE  
Refer to Tables 22 and 23 for hardware and software points.  
Equipment Mode  
Activate Evacuation  
Mode  
Cool  
Disable  
EVAC  
Space Control Point  
Mod. Econ Enabled  
74  
No  
dF  
dF  
CTRLPT  
Control ECON_OK  
Head Pressure Control Disable  
Control  
HEAD  
Economizer Control  
77.22  
ECONPT  
Temp.  
Compressor Cooling Disable  
Duct Static Failure Normal  
COMPRES  
DSP_ALM  
C1_ALM  
C2_ALM  
C3_ALM  
C4_ALM  
Compressor 1 Alarm Normal  
Compressor 2 Alarm Normal  
Compressor 3 Alarm Normal  
Compressor 4 Alarm Normal  
Cond. Flow Alarm Status Disable  
Control CDWF_ST  
46  
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DISPLAY ALARM HISTORY — If the controller is indicat-  
ing there are alarms, the user can view the alarm history by  
SET CONTROLLER ADDRESS — To set the address of the  
Omnizone™ system control panel controller, perform the fol-  
lowing procedure:  
HIST  
pressing the  
button. The LID display will show “Alarm  
. The LID display will show the date  
1. Press 7 and then  
EXPN/EDIT  
2. Type in the CCN element number and press  
. Press  
and then  
ENTER  
SRVC  
History.” Press  
ENTER  
and type of alarm.  
.
.
ENTER  
As an example, if the LID display shows:  
ALARM — 10:55 02-11-04  
SFS  
3. Press the  
press  
button. Type in the CCN bus number and  
.
ENTER  
LOG OFF FROM CONTROLLER — To log off from the  
OMNIZONE system control panel controller Press 3 and then  
That display indicates that on 02-11-04 at 10:55 a.m. the  
supply fan was either on when it had not been commanded on  
or was off when it was commanded on.  
. The controller password will be displayed.  
SET  
The user can view other stored alarms by pressing the up and  
down arrows. The twenty-four most recent alarms are stored.  
1. Press  
. The display should show:  
ENTER  
Log in to Controller  
Logged in  
If this is not displayed, Press  
played.  
CONFIGURE CUSTOM PROGRAMMING SELEC-  
TIONS — To configure the custom programming selections,  
perform the following procedure:  
until it is dis-  
EXPN/EDIT  
1. Press 37  
. The LID display will show:  
ALGO  
Custom Program  
2. Press . The LID display will show:  
2. Press the  
Log out of Controller  
Press 1. Press  
button. The LID display will show:  
ENTER  
to log off.  
ENTER  
2.0 Global Dictionary  
OMNIZONE  
Sequence of Operation (CV Only) — The follow-  
ing sequence applies to constant volume units only.  
3. Press  
. The display indicates “No Data.” Press  
ENTER  
CLEAR  
Cooling is initiated when the set point in the remote thermo-  
stat is not met (space temperature is higher than set point). The  
unit sequence of operation is as follows:  
then press  
. Press  
again.  
ENTER  
EXPN/EDIT  
The LID display should now show:  
Compressor Stages  
2.00 (sizes 020-034)  
4.00 (sizes 044-064)  
The 50BV units can be remotely authorized to be controlled  
by the thermostat through the optional energy management  
system relay (EMS). The coil is powered by the energy man-  
agement (building automation) system whose contacts are in  
series with the ‘R’ 24-v ac terminal with potential across ‘C’  
(transformer common). With this terminal open, power will be  
interrupted to the thermostat. Closure of this contact will allow  
the 50BV unit to operate from the thermostat.  
4. Press  
7 times. The display will show:  
0 = RAT, 1 = MAT 2 = NONE  
0.00  
5. Press 2 then  
. The display will show:  
ENTER  
Contact closure at the ‘G’ terminal will provide power to  
the supply fan contactor, energizing the supply fan. The supply  
fan will be off during unoccupied schedule, depending upon  
the features of the thermostat used. The ‘O’ terminal energizes  
the reversing valve (heat pump units only). Typically ‘Y1’ will  
also be energized at this time for cooling operation. During the  
second stage of cooling, ‘Y2’ will be initialized after a mini-  
mum run time and after there is a differential from set point  
plus a deadband or a proportional plus integral calculation,  
which is based upon demand and the length of time space-  
temperature is greater than set point. Additional assurance is  
provided by a delay on make timer in the second stage com-  
pressor contactor circuit to avoid dual compressor in-rush start-  
ing current.  
For 4 compressor units, a call for the first stage of cooling  
will turn on compressors 1 and 2. The second stage of cooling  
will turn on compressors 3 and 4.  
Heating mode (heat pump models only) follows the same  
sequence as above except that the reversing valve is not  
energized.  
WATER ECONOMIZER COOLING — The unit diverts  
condenser inlet waterflow through an optional economizer coil  
to precool evaporator entering airflow. If the entering water  
temperature is colder than the setting on the aquastat, and the  
return-air temperature is warmer than the setting on the return-  
air thermostat, the 3-way diverting valve will direct water to  
the economizer coil.  
Economizer water flow is in series with the condensers  
allowing compressor operation while the economizer is  
operating.  
0 = RAT, 1 = MAT 2 = NONE  
2.00  
6. If RAS is installed at EWT input, press  
The display will show:  
3 times.  
EWT Reset 0 = NO, 1 = YES  
0.00  
7. Press 1 then  
. The display will now show:  
ENTER  
EWT Reset 0 - NO, 1 = YES  
1.00  
8. Use the down and up arrows to select the other configura-  
tion parameters as required. See Table 24 for a list of con-  
figuration parameters.  
Table 24 — Configuration Parameters  
DESCRIPTION  
VALUE  
UNITS  
NAME  
Compressor Stages  
Reset Ratio  
2.00  
3.00  
0.00  
0.00  
0.00  
0.00  
0.00  
2.00  
0.00  
0.00  
68.00  
0.00  
0.00  
0.00  
0.00  
0.00  
0.00  
0.00  
1.00  
–0.50  
NUM_CMP  
RSET_RTO  
CDFW_SWT  
EWT_SNS  
EWT_RST  
MOD_ECON  
FLOW_TYP  
MARA_SNS  
PHAS_SWT  
FREZ_SWT  
ECON_SET  
SPT_SNS  
PRES_SNS  
TWR_SNS  
LWT_SNS  
IAQ_SNS  
IRH_SNS  
BSP_SNS  
dF  
CDWF 0=NO,1=YES  
*ECON 0=NO,1=YES  
EWT Reset 0=NO,1=YES  
*MOD.VLV 0=NO,1=YES  
*0=CONST.,1=VARIABLE  
0=RAT,1=MAT 2=NONE  
PHASE 0=NO,1=YES  
*FREEZ 0=NO,1=YES  
*ENABLE ECON.  
dF  
SPT 0=NO,1=YES  
PRES 0=NO,1=YES  
TWR 0=NO,1=YES  
LWT 0=NO,1=YES  
IAQ 0=NO,1=YES  
IRH 0=NO,1=YES  
BSP 0=NO,1=YES  
BSP Range  
in. H2O BSP_RNG  
in. H2O BSP_LOW  
BSP LOW VALUE  
*Not used.  
47  
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OKFAN will turn off, SF_SFS will turn off, Tower and PUMP  
will turn off, and then 5 minutes later the SF point will turn off  
and the VFD speed will go to 0%.  
Sequence of Operation (VAV Only) — The fol-  
lowing control sequence of operation for the VAV units de-  
scribes the various sequences that occur depending upon the  
way an operation is triggered and which software control  
points are involved.  
SUPPLY FAN — The supply fan can be activated in any of  
the following ways:  
• Unoccupied space or return air temperature demand  
• Unoccupied linkage demand  
• Local time schedule (TIMCLOCK software point)  
• Remote occupancy (ROCC software point)  
• Remote-off-local switch in the local mode  
• Enabled by schedule  
During the 5-minute delay, the cooling and heating routines  
become disabled. This delay allows a compressor that may  
have just started to run for its 5-minute minimum on time with  
the supply fan on. For example, if the staging routine had just  
started Compressor 3 at the time the OKFAN point changed to  
OFF, the cooling routine would become disabled and compres-  
sors 1 and 2 would shut off right away. Compressor three  
would continue to run for its minimum on time of 5 minutes.  
The fan continues running until all compressors meet the mini-  
mum on time and run with a load, preventing them from shut-  
ting down due to a safety.  
Once one of the above conditions exists, either TIME-  
CLOCK or ROCC indicates ON or enable. The software point  
OKFAN will turn on followed by the points TRMCT for air  
terminal control and PUMP and TOWER to request condenser  
water flow and temperature control. Approximately 20 to  
30 seconds later, the supply fan (SF) point will turn ON and the  
VFD output SPEED will increase. The SPEED point will  
output a signal, determined by a PID (proportional integral de-  
rivative loop) calculation, based on the duct static pressure  
(DSP) input and the supply static pressure setpoint in  
SETPT05.  
COMPRESSOR COOLING — If the fan is on and there is no  
demand for heat, the Equipment mode (MODE) will be  
COOL, and Cooling (COOLOK) will switch to ENABLE.  
COMRES triggers the compressor staging routine that con-  
trols the number of compressors energized. Units are equipped  
with 2 or 4 compressors piped in separate refrigerant circuits,  
and staged On/Off in a fixed sequential manner (compressor  
no. 1 through compressor no. 4). The compressor control rou-  
tine uses a PID calculation to determine the percentage of cool-  
ing required, from 1 to 100%. Demand for the PID calculation  
is determined from the supply air temperature and the supply  
air setpoint (SETPT06).  
Once the supply fan is running and the static pressure in-  
creases above the supply fan status setpoint in SETPT01, the  
supply fan status point (SFS) will indicate ON and the software  
point SF_SFS will indicate TRUE.  
Compressor cooling (COMPRES) will be turned off for any  
of the following reasons:  
• There is no condenser water flow (CDWF is Off).  
• MODE changes to heat.  
Enabled By Unoccupied Demand — A software point “space  
control point” will display the current value of the sensor used  
to determine unoccupied demand. The EWT sensor provides  
this function for the 50BV unit. The display is based on the  
sensors installed and the configuration of these sensors in the  
custom configuration, or the status of linkage.  
If there is no RAS connected to the EWT input, the space  
control point will display a default value of 75 F. This value is  
above the default occupied cooling set point and below the  
unoccupied cooling set point. If this condition exists, supply air  
reset from a sensor and unoccupied unit operation will not  
occur.  
• OKFAN turns off during normal shut down.  
During normal compressor operation the minimum on time  
is 5 minutes and the minimum off time is 5 minutes.  
WATER ECONOMIZER COOLING — The unit diverts  
condenser inlet waterflow through an optional economizer coil  
to precool evaporator entering airflow. If the entering water  
temperature is colder than the setting on the aquastat, and the  
return-air temperature is warmer than the setting on the return-  
air thermostat, the three-way diverting valve will direct water  
to the economizer coil.  
If the unit is configured to use an RAS sensor for the Space  
Control Point or if linkage is active and the space has unoccu-  
pied demand, the software point OKFAN will turn on followed  
by the software points TRMCT for air terminal control and  
PUMP and TOWER to request condenser water flow and tem-  
perature control. Approximately 20 to 30 seconds later the SF  
point will turn ON and then the VFD output SPEED will in-  
crease. If unoccupied demand is the reason the fan is on, a con-  
trol force will appear next to the OKFAN point. Otherwise,  
there should not be a force on that point.  
If the fan is running due to unoccupied heating or cooling  
demand, either the space temperature (if installed), return-air  
temperature, or average linkage temperature must rise or drop  
to within half way between the occupied and unoccupied set  
points in order for the fan to turn back off.  
Economizer water flow is in series with the condensers,  
allowing compressor operation while the economizer is  
operating.  
NOTE: The return-air thermostat (RAT) is separate from the  
RAS sensor.  
COOLING RESET — The 5 kiloohm temperature sensor will  
be used as the space control point. If this variable goes below  
the occupied high set point in the HEAT/COOL MODE AND  
RESET set point (SETPT03), then for each degree that the  
space control point is below the set point value, the supply air  
set point will be reset by the value configured in the custom  
configuration RESET RATIO.  
Diagnostic Features (CV Only) — The main con-  
trol board (MCB) in the constant volume units has 2 LEDs that  
provide diagnostic information. Refer to the Troubleshooting  
section for a detailed description of the LED codes.  
Enabled by Switching to Local Mode — When the switch is  
placed in the Local mode the ROCC point will indicate enable.  
If ROCC is ENABLED a software routine will override the oc-  
cupancy schedule so that TIMECLOCK will also turn on.  
When ROCC is turned off the TIMECLOCK point will turn  
off within 60 seconds.  
VAV Control and VFD Diagnostics — Refer to the  
50BV,XJ Controls Operation and Troubleshooting manual for  
detailed information about diagnosing and correcting control  
and VFD messages.  
Supply Fan Shutdown — If the unoccupied demand is satis-  
fied and TIMECLOCK and ROCC are off and disabled,  
48  
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cooling coils, microbial growth (mold) can result, causing foul  
odors and health related indoor air quality problems.  
SERVICE  
CAUTION  
Coils can become dirty over a period of time, especially  
if air filter maintenance is neglected. Coils should be in-  
spected regularly and cleaned when necessary. Clean coils  
with a vacuum cleaner, fresh water, compressed air, or a  
bristle brush (not wire). Do not use high-pressure water or  
air. Damage to fins may result. Backflush coil to remove de-  
bris. Commercial coil cleaners may also be used to help re-  
move grease and dirt. Steam cleaning is NOT recommend-  
ed. After cleaning, use a fin comb of the correct fin spacing  
when straightening mashed or bent coil fins.  
Units installed in corrosive environments should be  
cleaned as part of a planned maintenance schedule. In this  
type of application, all accumulations of dirt should be  
cleaned off the coil.  
Improper phase sequence will cause scroll compressor  
failure due to reverse rotation.  
Signs of miswire are:  
• Excessive noise  
• Reverse rotation of 3 phase indoor fan  
• Rapid temperature rise on suction tube  
• No pressure differential  
Correct immediately. Shut off power at disconnect  
and switch any 2 power leads at unit terminal block or  
pigtails.  
Compressor Rotation — To determine whether or not  
the compressor is rotating in the proper direction:  
Inspection — Check coil baffles for tight fit to prevent air  
from bypassing the coil. Check panels for air leakage, particu-  
larly those sealing the fan and coil compartments. Check for  
loose electrical connections, compressor oil levels, proper re-  
frigerant charge, and refrigerant piping leaks. Before start-up,  
be sure all optional service valves are open.  
1. Connect service gages to suction and discharge pressure  
fittings.  
2. Energize the compressor.  
The suction pressure should drop and the discharge pres-  
sure should rise, as is normal on any start-up. If the suc-  
tion pressure does not drop and the discharge pressure  
does not rise to normal levels:  
Air Filters — The 50BV single-piece units come with 1-in.  
filters. The standard 1-in. filters provide lower pressure drop  
and longer filter service intervals. The 50BV modular units  
come with 4-in. filters.  
Inspect air filters every 30 days and replace filters as  
necessary.  
Replacement filters should have a minimum efficiency rat-  
ing of MERV 6 per ASHRAE rating procedures and be rated  
for up to 625 fpm velocity. Job requirements or local codes  
may specify higher minimum ratings.  
3. Turn off power to the unit and tag disconnect.  
4. Reverse any 2 of the unit power leads.  
Reapply power to the unit. The suction and discharge  
pressure levels should now move to their normal start-up  
levels.  
Also, check that the fan is rotating in the proper direction.  
NOTE: When the compressor is rotating in the wrong direc-  
tion, the unit makes an elevated level of noise and does not  
provide cooling.  
Condensate Drains — Clean the drain line and unit  
drain pan at the start of each cooling season. Check flow by  
pouring water into the drain.  
Fan Motor Replacement — If required, replace the  
fan motor with an equal or better type and efficiency motor  
with equal horsepower. The motor must be rated for a VFD or  
inverter application. Do not change the horsepower unless  
there is a system design requirement change and VFD size  
analysis.  
CHECK/CHANGE VFD OUTPUT CURRENT LIMIT —  
The VFD provides additional fan motor protection by limiting  
the output current to a programmed value. This value has been  
factory set according to the factory-installed motor and VFD  
sizing options.  
Water-Cooled Condensers — Water-cooled condens-  
ers may require cleaning of the scale (water deposits) due to  
improperly maintained closed-loop water systems. Sludge  
build-up may need to be cleaned in an open tower system due  
to inducted contaminants.  
Local water conditions may cause excessive fouling or pit-  
ting of tubes. Condenser tubes should be cleaned at least once a  
year, or more often if the water is contaminated.  
Proper water treatment can minimize tube fouling and  
pitting. If such conditions are anticipated, water treatment  
analysis is recommended. Refer to the System Design Manual,  
Part 5, for general water conditioning information.  
If the VFD and/or motor is replaced, the VFD setup mode  
parameter "tHr1" should be reprogrammed to the following  
calculated values for optimum motor protection and operating  
range:  
CAUTION  
For VFD size about equal to motor:  
tHr1 = 100*motor nameplate Amps / VFD rated output Amps  
Follow all safety codes. Wear safety glasses and rubber  
gloves when using inhibited hydrochloric acid solution.  
Observe and follow acid manufacturer’s instructions.  
MAINTENANCE  
Cleaning Unit Exterior — Unit exterior panels should  
be wiped down using a damp soft cloth or sponge with a mix-  
ture of warm water and a mild detergent.  
Isolate the supply and return water connections when re-  
moving piping to the condenser.  
Clean condensers with an inhibited hydrochloric acid solu-  
tion. The acid can stain hands and clothing, attack concrete,  
and, without inhibitor, can attack steel. Cover surroundings to  
guard against splashing. Vapors from vent pipe are not harmful,  
but take care to prevent liquid from being carried over by the  
gases.  
Coil Cleaning — Hot water, steam, and direct expansion  
coils must be cleaned at least once a year to maintain peak per-  
formance. Dirty coils can contribute to decreased heating or  
cooling capacity and efficiency, increased operating costs, and  
compressor problems on direct expansion systems. Dirt,  
grease, and other oils can also reduce the wettability of the coil  
surfaces, which can result in moisture blow-off from cooling  
coils and resulting water leakage problems. If the grime on the  
surface of the coils becomes wet, which commonly occurs with  
Warm solution acts faster, but cold solution is just as effec-  
tive if applied for a longer period.  
49  
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GRAVITY FLOW METHOD (Fig. 34) — Do not add solu-  
tion faster than the vent can exhaust the generated gases.  
When condenser is full, allow the solution to remain over-  
night then drain the condenser and flush with clean water. Fol-  
low acid manufacturer’s instructions.  
FORCED CIRCULATION METHOD (Fig. 35) — Fully open  
the vent pipe when filling the condenser. The vent may be  
closed when the condenser is full and the pump is operating.  
Fan Motor Lubrication — The fan motor was properly  
lubricated at the time of manufacture. Lubricate the fan  
motor(s) with SAE-20 non-detergent electric oil.  
IMPORTANT: PILLOW BLOCK STYLE FAN BEAR-  
INGS: Bearings have been prelubricated with high quality  
grease. Bearings must be relubricated once every 6 months  
or every 2500 hours of operation whichever comes first.  
Regulate the flow to the condenser with a supply line valve.  
If the pump is the non-overloading type, the valve may be fully  
closed while the pump is running.  
For average scale deposit, allow the solution to remain in  
the condenser overnight. For heavy scale deposit, allow a full  
24 hours. Drain the condenser and flush with clean water.  
Follow acid manufacturer’s instructions.  
Fan Bearing Lubrication — Inspect the fan bearings  
for proper lubrication every 6 month or 2500 hours of opera-  
tion, whichever comes first. Standard units have grease fittings  
on the fan shaft bearings, located on each side of the blower  
wheel. Lubricate bearings with a lithium-based grease (NLGI  
Grade 2).  
Fan Sheaves — Factory-supplied drives are pre-aligned  
and tensioned, however, it is recommended that the belt tension  
and alignment be checked before starting the unit. Always  
check the drive alignment after adjusting belt tension.  
To install sheaves on the fan or motor shaft:  
1. Isolate power to the unit.  
2. Remove side unit access panel(s).  
3. Remove any rust-preventive coating on the fan shaft.  
4. Make sure the shaft is clean and free of burrs. Add grease  
or lubricant to bore of sheave before installing.  
5. Mount sheave on the shaft; to prevent bearing damage, do  
not use excessive force.  
Each factory-assembled fan, shaft, and drive sheave assem-  
bly is precision aligned and balanced. If excessive unit  
vibration occurs after field replacement of sheaves, the unit  
should be rebalanced. To change the drive ratio, follow the  
steps in the Evaporator Fan Performance Adjustment section  
(page 51).  
After 1 to 3 minutes of operation, check the belt tension.  
Also check tension frequently during the first 24 hours of oper-  
ation and adjust if necessary. Periodically check belt tension  
throughout the run-in period, which is normally the initial  
72 hours of operation.  
ALIGNMENT — Make sure that fan shafts and motor shafts  
are parallel and level. The most common causes of misalign-  
ment are nonparallel shafts and improperly located sheaves.  
Where shafts are not parallel, belts on one side are drawn tight-  
er and pull more than their share of the load. As a result, these  
belts wear out faster, requiring the entire set to be replaced be-  
fore it has given maximum service. If misalignment is in the  
sheave, belts enter and leave the grooves at an angle, causing  
excessive belt and sheave wear.  
Fig. 34 — Gravity Flow Method  
a50-187tf  
Shaft Alignment — Check shaft alignment by measuring the  
distance between the shafts at 3 or more locations. If the dis-  
tances are equal, then the shafts are parallel.  
Sheave Alignment  
1. To check the location of the fixed sheaves on the shafts,  
use a straightedge or a piece of string. If the sheaves are  
properly aligned, the string will touch them at the points  
indicated by the arrows in Fig. 36. Rotate each sheave a  
half revolution to determine whether the sheave is wob-  
bly or the drive shaft is bent. Correct any misalignment.  
2. With sheaves aligned, tighten cap screws evenly and  
progressively.  
1
1
NOTE: There should be a /8-in. to /4-in. gap between  
the mating part hub and the bushing flange. If the gap is  
closed, the bushing is probably the wrong size.  
Fig. 35 — Forced Circulation Method  
3. With taper-lock bushed hubs, be sure the bushing bolts  
are tightened evenly to prevent side-to-side pulley wob-  
ble. Check by rotating sheaves and rechecking sheave  
alignment. When substituting field-supplied sheaves for  
factory-supplied sheaves, only the motor sheave should  
be changed.  
50  
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Charging the System  
REMOTE AIR-COOLED UNITS — The 50BVE,K,U,X units  
are shipped with a holding charge of dry nitrogen. Remote  
condensers, interconnecting piping, and refrigerant to charge the  
system are all field supplied.  
a50-7135tf  
To evacuate the system, refer to GTAC II, Module 4, Dehy-  
dration for Proper Evacuation and Dehydration Techniques.  
To charge the 50BVE,K,U,X systems:  
1. Add an initial minimum refrigerant charge after evacu-  
ation to allow the unit to start. Refer to Tables 25A and  
25B. Additional refrigerant will be added based on the  
length of interconnecting piping and vertical separa-  
tion between the indoor unit and the condenser(s).  
Table 25A — Minimum Operating Charge (lb),  
50BVE,K Units Matched with 09DK Condensers  
UNIT SIZE  
020  
024  
028  
034  
Circuit 1...2  
8.1...8.1  
9.1...9.1  
9.1...9.1  
18...18  
Table 25B — Minimum Operating Charge (lb),  
50BVU,X Units Matched with 09DK Condensers  
Fig. 36 — Sheave Alignment  
Evaporator Fan Performance Adjustment —  
UNIT SIZE  
Circuit 1...2  
Circuit 3...4  
034  
18...18  
-
044  
10...10  
10...10  
054  
18...18  
18...18  
064  
18...18  
18...18  
To change fan speeds from factory settings:  
1. Shut off unit power supply.  
2. Loosen nuts on the 4 carriage bolts in the mounting  
base. Using adjusting bolts and plate, slide the motor  
and remove the belt.  
2. To finish charging the system, make sure the unit  
is running at full-load operating conditions. Charge to  
a clear sight glass. Refer to GTAC II, Module 5,  
Charging, Recovery, Recycling and Reclamation and  
the Refrigerant Service Techniques manual for proper  
charging techniques.  
3. Loosen movable-pulley flange setscrew.  
4. Screw the movable flange toward the fixed flange to  
increase speed, and away from the fixed flange to  
decrease speed. Increasing the fan speed increases the  
load on the motor. Do not exceed the maximum speed  
specified in Tables 3A and 3B.  
3. Add 10 lb of R-22 or R-410A over a clear sight glass  
to flood subcooler section of the condenser coils.  
4. Alternately, and as a double-check, when properly  
charged at full-load operating conditions, there should  
be 15 F subcooling entering the TXV (the difference  
between saturated condenser temperature and actual  
liquid temperature entering the TXV).  
5. Set the movable flange at nearest keyway of the pulley  
hub and tighten the setscrew. (See Tables 3A and 3B  
for speed change for each full turn of pulley flange.)  
6. Replace and tighten the belts (see Belt Tension Adjust-  
ment section).  
Compressor Oil — All units are factory charged with  
oil. It is not necessary to add oil unless compressor(s) is re-  
moved from the unit. If necessary, oil can be removed/charged  
via Schrader fitting. Operate the system at high evaporator tem-  
perature prior to oil recharge to assist oil return to the compres-  
sor(s) from other system components. If necessary, recharge  
the system as shown in Table 26.  
7. Restore power to the unit.  
To align fan and motor pulleys:  
1. Loosen fan pulley setscrews.  
2. Slide fan pulley along fan shaft.  
3. Make angular alignment by loosening motor from  
mounting plate.  
Table 26 — Oil Recharge  
4. Restore power to unit.  
BELT TENSION ADJUSTMENT — Using a gage, apply  
4 lb of force to the center of the belt and adjust the tension until  
a deflection of 1/64-in. is achieved for every inch of shaft center  
distance. See Fig. 37.  
Ideal belt tension is the lowest value under which belt slip  
will not occur at peak load conditions.  
OIL  
50BV  
UNIT  
OIL  
PART  
SIZE COMPRESSOR RECHARGE  
(oz)  
TYPE  
NUMBER  
020  
024  
028  
034  
034  
044  
054  
064  
ZR94KC  
ZR108KC  
ZR144KC  
ZR19M3  
ZR19M3  
ZR125KC  
ZR16M3  
ZR19M3  
81  
106  
106  
137  
137  
106  
137  
137  
C,E,  
Q,J,K  
3GS 150  
viscosity  
yellow  
mineral  
oil  
P903-0101  
T,U,  
V,W,X  
LB FORCE  
TROUBLESHOOTING  
Refer to Tables 27-29 to determine the possible cause of the  
problem and the associated procedure necessary to correct it.  
See Fig. 38-47 for unit and control wiring.  
DEFLECTION  
a50-7136ef  
Fig. 37 — Fan Belt Tension  
51  
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Table 27 — Run Test Troubleshooting (VAV Units Only)  
PROBLEM  
POSSIBLE CAUSE  
Control modules do not have lights when unit power is on.  
Control display does not light up when unit power is on.  
Run test will not start.  
Transformer open. Circuit breaker open. Power wiring open. Module failure.  
Connection location. Interface cable open. Display failure.  
Pre-existing ALARM (red)? Not “Logged in” with password.  
Switch not in local.  
WARN (yellow) LED does not light during run test.  
ALARM (red) LED does not light during run test.  
Wiring open. Lamp failure. Control module failure.  
Wiring open. Lamp open. Control module failure.  
Run test stops, ALARM (red) LED light is lit after it blinks once. Bypass switch to LINE. Mode switch to OFF. Duct high  
pressure switch open. Fire shutdown input or jumper open.  
Supply air temp out of range. Duct static pressure sensor out of range.  
Compressor resistor board wiring error or failure.  
Fan does not start/ALARM (red) LED blinks 2 times.  
Fan relay failure.  
Run test stop, ALARM (red) LED is lit after blinking 3 times.  
Wiring open. VFD connection error. VFD setup error. Fan relay failure.  
Current isolator failure. Control module failure.  
Run test stop, ALARM (red) LED is lit after it blinks 4 times.  
Fan does not increase speed.  
VFD connection error. VFD setup error.  
Current isolator load adjustment too low.  
Fan does not stop after ALARM (red) LED blinks 5 times.  
Fan rotation is backwards.  
Fan relay failure.  
VFD to motor wiring sequence error. VFD setup error.  
Run test stop, ALARM (red) LED is lit after blinking 6 times.  
Compressor 1 does not start.  
Wiring open. Compressor resistor board wiring error or failure.  
High pressure switch, low pressure switch, coil frost switch,  
or compressor protection module open. Compressor relay failure.  
Contactor failure. Control module failure. No refrigerant charge.  
Run test stop, ALARM (red) LED is lit after blinking 7 times.  
Compressor 2 does not start.  
Wiring open. Compressor resistor board wiring error or failure.  
High pressure switch, low pressure switch, coil frost switch,  
or compressor protection module open. Compressor relay failure.  
Contactor failure. Control module failure. No refrigerant charge.  
Run test stop, ALARM (red) LED is lit after blinking 8 times.  
Compressor 3 does not start.  
Wiring open. Compressor resistor board wiring error or failure.  
High pressure switch, low pressure switch, coil frost switch,  
or compressor protection module open. Compressor relay failure.  
Contactor failure. Control module failure. No refrigerant charge.  
Run test stop, ALARM (red) LED is lit after blinking 9 times.  
Compressor 4 does not start.  
Wiring open. Compressor resistor board wiring error or failure.  
High pressure switch, low pressure switch, coil frost switch,  
or compressor protection module open. Compressor relay failure.  
Contactor failure. Control module failure. No refrigerant charge.  
Compressor rotation is backwards.  
“C” message in I/O status display.  
Field power wiring sequence error. Compressor power wiring sequence error.  
No input signal or communication failure.  
“Service” message in I/O status display.  
“Supervisor” message in I/O status display.  
ALARM (red) LED always on, will not enter run test.  
Value is forced from 6400 keypad entry.  
Value is forced from network communication (i.e., PC).  
SAT, DSP, CSMUX, DHS, or PHASE input values. Mode switch OFF.  
NOTE: For more information on VAV controls, refer to the 50BV,XJ Controls Operation and Troubleshooting Manual.  
52  
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Table 28 — Unit Troubleshooting  
PROBLEM  
POSSIBLE CAUSE  
CORRECTION PROCEDURE  
Unit Will Not Start.  
Loss of unit power  
Check power source.  
Check fuses, circuit breakers, disconnect switch.  
Check electrical contacts.  
Unit voltage not correct  
Open fuse  
Open protection device  
Unit or motor contactor out of order  
Contactor or relay overload or out of order  
VFD not running  
Check and correct.  
Check for short circuit in unit.  
Check relays (phase monitor option), contacts, pressure switches.  
Test and replace if necessary.  
Test and replace if necessary.  
Perform VFD diagnostic test.  
Test and replace if necessary.  
Replace belt.  
Fan Does Not Operate.  
Motor defective  
Broken belt  
Loose electrical contact  
Under voltage  
Defect in compressor motor  
Missing phase  
Tighten contact.  
Check and correct.  
Replace compressor.  
Check and correct.  
Compressor is Noisy, But  
Will Not Start.  
Compressor seized  
Check and replace if necessary.  
Test and replace if necessary.  
Check and correct any leaks. Add refrigerant.  
Check load calculation.  
Compressor Starts,  
But Does Not Continue  
to Run.  
Compressor or contact defect  
Unit is under charged  
Unit is too big  
Compressor is overloaded  
Check protection device and replace.  
Check for missing phase.  
Check TXV.  
Check temperature in suction discharge line.  
Unit is Noisy.  
Compressor noise  
Check TXV and replace if necessary.  
Compressor rotation incorrect; check and correct.  
Check internal noise.  
Tube vibration or condenser water problem  
Unit panel or part vibrating  
Unit is too small  
Check and correct.  
Check and tighten appropriate part.  
Check load calculation.  
Unit Runs Continuously,  
But Has Low Capacity.  
Low refrigerant or noncondensing gas present Check for leaks and add refrigerant or gas as necessary.  
Compressor defect  
Check pressure and amps. Replace if necessary.  
Insufficient flow of refrigerant in evaporator  
Check filter drier and replace if necessary.  
Check TXV and adjust or replace if necessary.  
Check position of TXV bulb and equalizer.  
Oil in evaporator  
Low airflow  
Drain evaporator.  
Check filters, and clean or replace as necessary.  
Check coils, and clean as necessary.  
Check for restrictions in ductwork.  
Check fan rotation and adjust.  
Check fan motor.  
Check belts for wear.  
High Discharge Pressure.  
Low waterflow in condenser  
Dirty condenser tubes.  
Purge air.  
Clean condenser.  
High temperature in condenser water  
Overcharged  
Check water tower fans and pumps.  
Check and reclaim excess charge.  
Adjust subcooling.  
Noncondensing gas present  
Verify and correct.  
LEGEND  
TXV — Thermostatic Expansion Valve  
VFD — Variable Frequency Drive  
53  
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Table 29 — CV Units LED Diagnostic Codes  
Forcing and Clearing an Input or Output (VAV  
Only) — During unit operation and/or troubleshooting, it  
may be necessary or desirable to clear an input or output.  
Tables 30 and 31 describe the procedure for forcing and clear-  
ing inputs and outputs.  
NO. OF BLINKS  
DESCRIPTION  
1
2
3
4
5
6
1st Stage High-Pressure Lockout  
1st Stage Low-Pressure Lockout  
2nd Stage High-Pressure Lockout  
2nd Stage Low-Pressure Lockout  
Freeze Protection Lockout*  
Condensate Overflow Lockout*  
*Freeze protection and condensate overflow lockout require optional  
sensors.  
NOTE: The main control board has a red LED (light-emitting diode)  
for fault indication and will blink a code as described above. Count  
the number of blinks to determine the lockout condition.  
Table 30 — Forcing an Input or Output  
STEP NO. INSTRUCTION/ACTION  
1. Press 3, SET, ENTER.  
2. Press ENTER.  
3. Press 1111, ENTER.  
4. Press STAT.  
RESULT  
“Controller Password”  
“Log in to Controller” “Enter Password”  
“Log in to Controller” “Logged in”  
“Hardware Points”  
5. Press ENTER.  
“Supply Air Temperature”  
6. Press down arrow to obtain desired item.  
(NOTE: Order is PCB1 I/O, PCB2 I/O, PCB3 I/O.)  
7. Key in force value (1=on/start, 0 = off/stop), ENTER. Force value/status “Service”  
Table 31 — Clearing a Forced Input or Output  
STEP NO. INSTRUCTION/ACTION  
RESULT  
1. Press 3, SET, ENTER.  
2. Press ENTER.  
3. Press 1111, ENTER.  
4. Press STAT.  
“Controller Password”  
“Log in to Controller” “Enter Password”  
“Log in to Controller” “Logged in”  
“Hardware Points”  
5. Press ENTER.  
“Supply Air Temperature”  
6. Press down arrow to obtain desired item.  
7. Press CLEAR, ENTER.  
(NOTE: Order is PCB1 I/O, PCB2 I/O, PCB3 I/O.)  
Auto value/status (NOTE: “Service” must be gone.)  
54  
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a50-8250  
55  
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A50-8251  
56  
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a50-7279ef  
57  
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58  
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a50-7284ef  
59  
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60  
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a50-7282ef  
61  
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1
2
3
1
2
4
a50-7283ef  
62  
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a50-7285ef  
VFD2  
C O M M O N ( C )  
VFD1  
A C ( 2 R 4 ) V  
CSMUX  
63  
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a50-7286ef  
VFD2  
C O M M O N ( C )  
VFD1  
A C ( 2 R 4 ) V  
CSMUX  
64  
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LEGEND AND NOTES FOR FIG. 41-47  
LEGEND  
LPS  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Low Refrigerant Pressure Switch  
Mixed/Return Air Temperature Sensor  
Motorized Ball Valve Relay  
Local/Remote Control Relays  
Compressor Motor Protector  
Unit Control Board  
ALARM — Unit Alarm Relay (Critical Fault)  
ALM-CM— Alarm/Warning Relay Common  
MA_RA  
MBVR  
MSR  
AO  
— Analog Output  
AQUA — Aquastat  
OLR  
BM  
— Blower Motor  
PCB1  
PCB2,3  
PHASE  
PHASER  
RAT  
BPS_S — Fan Start/Stop Relay (VFD Bypass Mode)  
I/O Expansion Board  
BR  
— Blower Relay  
Phase/Rotation Monitor  
Phase Monitor Relay  
BYPAS — VFD Bypass Control  
CBR  
CC  
CCN  
— Circuit Breaker  
Return Air Thermostat  
External Reset  
— Compressor Contactor  
— Carrier Comfort Network®  
RESET  
ROCC  
SAT  
Remote Occupancy  
CDWF — Condenser Waterflow Relay  
CDWFS — Condenser Waterflow Switch  
Supply Air Temp. Sensor  
Space/Zone Temperature Sensor  
Supply Fan Start/Stop Relay  
0-10 VDC Signal Isolator for VFD  
Switch  
SPT  
SF  
CLO  
CMP  
— Compressor Lockout Control  
— Compressor Control Relay  
SPEED  
SW  
COMPR — Compressor  
CSMUX — Signal Multiplexer-Comp Status  
T
TB2  
Transformer  
Terminal Block for Field Connections  
Transformer  
DHS  
DO  
DSP  
— Duct High Static Limit Switch  
— Digital Output  
— Duct Static Pressure Transducer  
TRANS  
TRMCT  
TRMOP  
VENTR  
VFD  
VAV Terminals Control  
VAV Terminals Open  
Ventilation Output  
Variable Frequency Drive  
Unit Warning Relay (Non-Critical Fault)  
Factory Wiring  
Field Wiring  
ECONO — Economizer Valve/Damper Control  
EWT  
FLTS  
— Entering Water Temperature Sensor  
— Filter Status Switch  
FREEZ — Freeze Thermostat (Water Economizer)  
WARN  
FSD  
GND  
HIR  
— Fire Alarm/Shutdown  
— Ground  
— Heat Interlock Relay  
— High Refrigerant Pressure Switch  
HPS  
NOTES:  
1. Partial wiring shown on both power and control diagrams.  
2. Class 2 transformer TRANS-1 is wired into separate circuit. Do not interconnect other  
transformers or circuits; circuit separation or compressor transformers from low voltage  
control panel transformers shall be maintained.  
3. Shielded wire shall have drain wire connected to VFD ground screw. The floating end  
of the drain wire shall be insulated.  
4. Shielded wire shall have drain wire connected to the control panel, adjacent to the  
PCB. The floating end of the drain wire shall be insulated.  
65  
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Copyright 2008 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53500001-01  
Printed in U.S.A.  
Form 50BV-3SI  
Pg 66  
10-08  
Replaces: 50BV-2SI  
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START-UP CHECKLIST  
(Fill out this form on Start-Up and file in job folder)  
I. PRELIMINARY INFORMATION:  
50BV UNIT:  
MODEL NO. ____________________ SERIAL NO. ____________________  
START-UP DATE: ______________________________________  
II. PRE-START-UP:  
VERIFY ALL SHIPPING MATERIALS HAVE BEEN REMOVED FROM THE UNIT  
IS THERE ANY SHIPPING DAMAGE? ________________ IF SO, WHERE ________________  
_________________________________________________________  
WILL THIS DAMAGE PREVENT UNIT START-UP?  
CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT? (Y/N) _______  
HAS THE GROUND WIRE BEEN CONNECTED? (Y/N) _______  
(Y/N) _______  
HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY? (Y/N) _______  
ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? (Y/N) _______  
HAS THE CORRECT INPUT POWER PHASE SEQUENCE BEEN CONFIRMED WITH A METER? (Y/N) _______  
HAS THE FAN AND MOTOR PULLEY BEEN CHECKED FOR PROPER ALIGNMENT  
AND DOES THE FAN BELT HAVE PROPER TENSION?  
HAS WATER BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE? (Y/N) _______  
ARE PROPER AIR FILTERS IN PLACE AND CLEAN? (Y/N) _______  
(Y/N) _______  
VERIFY THAT THE UNIT IS INSTALLED WITHIN LEVELING TOLERANCES  
(Y/N) _______  
CONTROLS  
HAS THE DUCT STATIC PRESSURE PROBE BEEN INSTALLED?  
HAVE CONTROL CONNECTIONS BEEN MADE AND CHECKED?  
(Y/N) _______  
(Y/N) _______  
ARE ALL WIRING TERMINALS (including main power supply) TIGHT? (Y/N) _______  
HAS AUTOMATIC RUN TEST BEEN COMPLETED?  
HAS THE VFD CHECKOUT BEEN COMPLETED?  
PIPING  
(Y/N) _______  
(Y/N) _______  
HAVE LEAK CHECKS BEEN MADE AT COMPRESSOR, CONDENSER, EVAPORATOR, TXVs (Thermostatic Expansion  
Valves), SOLENOID VALVES, FILTER DRIERS, AND FUSIBLE PLUGS WITH A LEAK DETECTOR? (Y/N) _______  
HAVE WATER AND STEAM VALVES BEEN OPENED (to fill piping and heat exchangers)?(Y/N) _______  
HAS AIR PURGE BEEN PERFORMED? (Y/N) _______  
ELECTRICAL  
CHECK VOLTAGE IMBALANCE  
LINE-TO-LINE VOLTS:  
(AB + AC + BC)/3 = AVERAGE VOLTAGE =  
MAXIMUM DEVIATION FROM AVERAGE VOLTAGE =  
AB  
V
AC  
V
BC  
V
V
V
VOLTAGE IMBALANCE = 100 X (MAX DEVIATION)/(AVERAGE VOLTAGE) =  
% (IF OVER 2% VOLT-  
AGE IMBALANCE, DO NOT ATTEMPT TO START SYSTEM; CALL LOCAL POWER COMPANY FOR ASSISTANCE.)  
CL-1  
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III. START-UP:  
CHECK FAN SPEED AND RECORD.  
AFTER AT LEAST 15 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS:  
CIRCUIT 1  
CIRCUIT 2  
CIRCUIT 3  
CIRCUIT 4  
SUCTION PRESSURE  
SATURATED SUCTION TEMP  
SUCTION LINE TEMP  
SUPERHEAT DEGREES  
DISCHARGE PRESSURE  
SATURATED CONDENSING  
LIQUID LINE TEMP  
SUBCOOLING DEGREES  
LIQUID SIGHT GLASS (CLEAR/BUBBLES)  
ENTERING CONDENSER-WATER TEMP  
LEAVING CONDENSER-WATER TEMP  
EVAP ENTERING-AIR DB (dry bulb) TEMP  
EVAP ENTERING-AIR WB (wet bulb) TEMP  
EVAP LEAVING-AIR DB TEMP  
EVAP LEAVING-AIR WB TEMP  
COMPRESSOR AMPS:  
L1  
L2  
L3  
SUPPLY FAN AMPS:  
L1  
L2  
L3  
NOTES: _______________________________________________________________________________________  
_______________________________________________________________________________________________  
_______________________________________________________________________________________________  
_______________________________________________________________________________________________  
Copyright 2008 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53500001-01  
Printed in U.S.A.  
Form 50BV-3SI  
Pg CL-2  
10-08  
Replaces: 50BV-2SI  
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